The same is found to be true in H20 molecules. • A common unit, litre (L) which is not an SI unit, is used for measurement of volume of liquids. … (Mol. Chemistry also plays an important role in daily life. It is also defined as the mass of one mole atoms. 1.1.1. It is also defined as the mass of 1 mole molecules. mass of solute in gm x 100 mass of solution in gm % weight by volume (w/v) : It is given as mass of solute present in per 100 ml of solution, i.e Example 10 : Solution i.e. 3 mole MOLE CONCEPT 98 2 atoms 2 x NA atoms 2 mole 6 mole s one atom 1 x NA atoms one mole 3 mole O 4 atoms 4 x NA atoms 4 mole 12 mole Mole means heap or collection of things. 12 g C requires 02 = 22.4 litre of 02 = 1 mole of O 1000 g C requires 02 litre 32 g of 02 var -5XVO 12 = 1866.67 litre 02 5 x 1866.67 = 9333.35 litre Volume — Volume Relationship : It relates the volume of gaseous species ( reactants or product ) with the volume of another gaseous species ( reactant or product ) involved in a chemical reaction. How many gram KCI and oxygen is produced. 12.14 (c) The Law of Multiple Proportion (Dalton) This law states that :when two elements A and B combine together to from more than one compound, then several, masses of A which separately combine with a fixed mass of B, are in a simple ratio. Elements: It is the simplest form of the matter. Atomic mass unit (amu) : = —L the mass of a carbon - Atomic mass Unit (amu) 12 lamu = 1.660539 x 10 24 gm. HOMOGENEOUS MIXTURES. 1 mol of N2 = 28gm of N2 = 1 gm molecule of N2 = No molecule = 2 No atoms For ions N3-, CF no.of moles = n gmquantity m Atomic mass/molecular mass 1 mol of any gas contains fixed volume i.e: 22.4 It at NT P (OOC & 1 bar) weight (grams) Number of moles of a species = w Atomic or molecular mass (g/ mole) M Volume occupied by gas at NT P Number of moles of a gas = Avogadro's hypothesis : Volume occupied by 1 mole of the gas at NT P Equal volume of the gases have equal number of molecules ( not atoms) at same temperature and pressure condition. % volume by volume (VIV) : It is given as volume of solute present in per 100 ml solution. mass, shape, size , different elements are different in nature. Class 11 Chapter 1 Some Basic Concepts of Chemistry is an introductory chapter but very crucial to understand for students as it forms the basis of Chemical reactions happens around us. Classification of matter meaning indivisible. wt Mass Volume at STP + 22.4 It Dividing % by atomic mass gives molar ratio from which empirical formula in obtained. 21-12 2 vol. One mole of any chemical substance contains fixed no. Membership feels like a huge effort towards a strong, diverse community of people who care about their Education. and atoms of On the basis of physical behaviour Solids Gases Liquids On the basis of chemical behaviour Pure substances Mixtures Compound Element The combination of elements to form compounds is governed by the following five basic laws. The Greek philosopher Domocritus named these building blocks as atoms, All these people had their philosphical views about matter, these views experimental test. Example H2(g) 1 unit vol. Number of equivalents of solute = n x number of moles of solute, Ml / n v (in litre) Ml V (in litre) . Mass of substance = 0.5 g Mass of solvent = 25 g 0.5 . Law Of Multiple Proportions 3.4. Performance & security by Cloudflare, Please complete the security check to access. Mass of KCI and 2 x 74.5 3 x 22.4 It Example 6 : Solution: Calculate the volume of 02 and volume of air needed for combustion of 1 kg carbon at STP. :.wtof ethanol in 1000 ml = gm 1 OOOd Mol of ethanol = 46 IOOOd IOOOd Molarity 46 mol 1000 46 & molality of ethanol = kg 1000 46 Parts per million (ppm) —Amount of solute ( in g ) with 106 g solvent Parts per billion ( ppb) •amount of solute ( in g ) with 109 g solvent Example 9 : Solution : 255 gm of an aqueous solution contains 5 gm of urea. If you have your own Study Notes which you think can benefit others, please upload on LearnPick. Class XI Chapter 1 – Some Basic Concepts of Chemistry Chemistry Question 1.1: Calculate the molecular mass of the following: (i) H2O (ii) CO2 (iii) CH4 Answer (i) H2O: The molecular mass of water, H2O = (2 × Atomic mass of hydrogen) + (1 × Atomic mass of oxygen) = [2(1.0084) + 1(16.00 u)] = 2.016 u + 16.00 u = 18.016 = … Another way to prevent getting this page in the future is to use Privacy Pass. Solution: The balanced equation is +502 = 3C02 +41420 Ivol 5 vol Ilitre 51itre 1 litre of propane requires = 5 litre of oxygen 20 litre of propane will require = 5 x 20 = 100 litre of oxygen at 760 mm pressure and OOC. • Mole Concept It is found that one gram atom of any element contains the same number of atoms and one gram molecule of any substance contains the same number of molecules. Please enable Cookies and reload the page. Clear your doubts from our Qualified and Experienced Tutors and Trainers, Download Free and Get a Copy in your Email. Highly recommended for every Student & Tutor who wants to learn and connect — even … x 100-1.96 mass of solute in gm x 100 volume of solution in ml Volume of solute in ml x 100 Volume of solution in ml 0.5 g of a substance is dissolved in 25 g of a solvent. As all objects in the universe are made of matter. (i) Write the balanced chemical equation. So in SI system, volume has units of m3. LAW OF CHEMICAL COMBINATION : (a) Law of Conservation of Mass : It states that matter can neither be created nor destroyed. SOME BASIC CONCEPTS OF CHEMISTRY INTRODUCTION Anything that occupies space and has mass is called matter. Chemistry is called the science of atoms and molecule Branches of Chemistry Organic Chemistry -This branch deals with study of carbon compounds especially hydrocarbons and their derivatives. It was John Dalton who firstly developed a theory on the structure of matter, known as Dalton's atomic theory. w n x no. Average atomic mass and molecular mass Ä (Average atomic mass) = total (Average molecular mass) = total Where A A A ..... are atomic mass of species 1, 2, 3, terms are for molecular masses. Similar Equivalent concept : w = no. INTERPRETATION OF BALANCED CHEMICAL EQUATIONS Once we get a balanced chemical equation then we can interpret a chemical equation by following ways Mass — mass analysis Mass — volume analysis Volume — volume analysis Now you can understand the above analysis by following example Mass — mass analysis Consider the reaction 2KC103 2KCl +302 According to stoichiometry of the reaction Mass — mass ratio : 2 x 122.5 : 2 x 74.5 : 3 x 32 Or Solution Mass of KC103 Mass of KCI Mass of KC103 Mass of 02 2 x 74.5 Example 5 : 367.5 gram KC103( M = 122.5) is heated. It is also defined as mass of 6.022 x 1023 molecules . 05/10/2019 07/10/2019 Chemistry ABC 0 Comments. ratio 2 1 3 Therefore, the empirical formula is Na2C03. mass xl .66 x 10 24 gm. wt Empirical and Molecular Formula : Mole x mol. New York, N.Y. : Wiley, ©1981 (OCoLC)645884878: Material Type: Calculate its empirical formula. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Formality (F) : Number of gram formula weight of a solute dissolve per litre of the solution. of equivalent of B = no. A balanced equation for this reaction is as given below: CH4 (g) + 202 (g) C02 (g) + 2 H20(g) The above balance reaction gives the following information: a) b) c) For every 1 mole of CH4, 2 mole of 02 will be required to produce 1 mole of C02 and 2 moles of 1-120. this signifies Mole — Mole relation For every 16 gms of CH4 , 64 gms of 02 will be required to produce 44gms of C02 and 36 gms of H20 this signifies Mass — Mass relation Ratio of moles of C02 : 1-120 at any time = 1 : 2, d) e) There will be no change in total mass of all reactants and products at any time for any chemical reaction. Example : C combines with O to form C02 and with H to form CH4. For the above reaction only, there will be no change in total number of moles of all reactants and products. How many grams of H20 is produced? I'm sure after learning these, you might become a fan of Chemistry. Molecular mass is a ratio and hence has no units. In C02 12 g of C reacts with 32g of O, whereas in CH4 12 g of reacts with 4g of H. Therefore when O combines with H, they should combine in the ratio of 32 : 4 (i.e. It is basic measuring unit of chemical substance. CONCENTRATION TERMS Molarity (M) : Number of moles present in one It of solution (mol/lt) w Molarity x 1000 m x V(ml) Example 8: 149 gm of potassium chloride (KCI) is dissolved in 10 Lt of an aqueous solution. Importance and Scope of Chemistry ; Nature of Matter ; Laws of Chemical Combinations ; Dalton’s Atomic Theory ; Atomic and Molecular Masses; Stoichiometry and Stoichiometric Calculations ; Some Important Points and Terms of the Chapter. This number has been experimentally determined and found to be equal to 6.022137 x 10 23 The value is generally called Avogadro’s number or Avogadro’s constant. Nature of Matter 1.1. % weight by weight (w/w): it is given as mass of solute present in per 100 gm of solution. But again, in chemistry laboratories, smaller volumes are used. 4%, 11.3%, O = 45.3%. Matter … Get this from a library! Cloudflare Ray ID: 60f13c885c2f7c17 Chemistry is the branch of the science which deals with the study of material object. of equivalent of A =no. Pure ethanol : d gm/ml (density of ethanol) (C2H50H) let volume of ethanol taken be 1000 ml. Matter can exist in three physical states based on the arrangement of constituent particles – solid, liquid and gaseous. That's great! The LibreTexts libraries are Powered by MindTouch ® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. • molecular mass n empirical formula mass Molecular formula = (Empirical formula)n (iii) Molecular mass = mass of 22.41 of gas or vapour at S.T.P Example 4 : A substance, on analysis, gave the following percentage composition: Na = 43. Percentage of the substance (w/w) 0.5+25. of urea = 60) Mass of urea = 5 gm Molecular mass of urea = 60 5 Number of moles of urea = — 0.083 60 Mass of solvent = (255 — 5) = 250 gm Number of moles of solute Molality of the solution = x 1000 Mass of solvent in gram 0.083 x 1000 = 0.332 250 Mole Fraction (X) The ratio of number of moles of the solute or solvent present in the solution and the total number of moles present in the solution is known as the mole fraction of substance concerned. The ratio of weight of H and O in 1-120 is 1 : 8. Let's learn about what Chemistry actually is and it's basic concepts that will help you understand Chemistry … To understand these concepts, Class 11 Chapter 1 Chemistry Notes are prepared by subject experts in well-defined and easy language. Properties of Matter 2.1. 2. Some Basic concepts of chemistry 1. The carbon-hydrogen bonds are only very slightly polar. Alkanes can be burned, alkanes can react with some of the halogens, breaking carbon-hydrogen bonds, and alkanes can crack by breaking the carbon-carbon bonds. mass of solute (g) x 1 formula mass of solute Volume of solution (L) PERCENTAGE CONCENTRATION The concentration of a solution may also be expressed in terms of percentage in the following way. In this section, you will study about the important topics of the chapter, overview, formulae and some important tips and guidelines for the preparation of the chapter at the best. Mass of one c162 atom = 12 a.m.u 12 1 1 a.m.u = mass of one c162 atoms NO X 12 NO 12 atom Nowadays amu has been replaced by 'u' which is known as unified mass. Pure Substance 2. Ancient Indian and greek philospher's believed that the wide variety of object around us are made from combination of five basic elements: Earth, Fire , Water , Air and Sky. 1.8: Cycloalkanes Many organic compounds have cyclic structures. Hence, volume is often denoted in cm3 or dm3 units. Are you one of those who loves Chemistry? of equivalent Equivalent mass (E) . Smallest unit of an element is known as atom. ratio : 2 It provides a relationship between vapour density and molecular mass of substances. The Indian philosopher Kanad (600 BC) was of the view that matter was composed of very small, indivisible particle called "parmanus". (ii) Write the atomic mass/molecular mass/moles/molar volumes of the species involved in calculations. For that reason, I decided to go ahead and explain here 15 important basic chemistry concepts, which hopefully will get you in a better shape for learning chemistry. Misxtures. Some Basic Concepts of Chemistry Classification of Matter Chemistry is the branch of science that deals with the study of the composition, structure, properties of matter and changes it undergoes. Gram Molecular Mass : The molecular mass of a substance expressed in gram is called the gram-molecular mass of the substance. Some Basic Concepts of Chemistry 6 • Volume has the units of (length)3. You might also be interest in taking a look to some basic organic chemistry books. 1.9: Organic Chemistry: Alkanes Summary of Chapter. C02 volume of 02 at STP C + 02. wt — At. Ancient Indian and greek philospher's believed that the wide variety of object around us are made from combination of five basic elements: Earth, Fire , Water , Air and Sky. Chemistry: 1. 2 x vapour density (VD) = molecular mass of gas. What is the concentration of the solution in terms of molality. wt. Before understanding how to calculate the amounts of reactants required or those produced in a chemical reaction, let us study what information is available from the balanced chemical equation of a given reaction. Anything which has mass and occupies space is called matter. [Exception of law is nuclear reactions where einstein equation is applicable.] ratio = 1 This law states that "equal voume of all gaseous under similar conditions of temperature and pressure contain equal number of molecules". ATOMIC AND MOLECULAR MASSES Atomic Mass : Average mass of an atom Atomic mass 1/12>< Mass of an atom of C 2 Gram Atomic Mass : The atomic mass of an element expressed in grams is called gram atomic mass of that element. But even if you are not, you must know some basic concepts of Chemistry. Some Basic Concepts of Chemistry IMPORTANCE OF CHEMISTRY Chemistry plays a central role in science and is often intertwined with other branches of science like physics, biology, geology etc. 02 1 vol. Molecular mass : Molecular mass of a molecule, of an element or a compound may be defined as a number which 1 indicates how many times heavier is a molecule of that element or compound as compared with — of 12 the mass of an atom of carbon—12. Law Of Conservation Of Mass 3.2. Example : co 12:16 ratio and 16 : 32 i.e. Here we have covered Important Questions on Some Basic Concepts of Chemistry for Class 11 Chemistry subject.. Chemistry Important Questions Class 11 are given below. Here you can get Class 11 Important Questions Chemistry based on NCERT Text book for Class XI.Chemistry Class 11 Important Questions are very helpful to score high marks in board exams. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Your IP: 185.246.67.47 H 2 + —02 1-420 2 2gm + 16gm 18gm Example 1: Solution: When 20 g of NaHC03 is heated, 12.62 g of Na2C03 and 5.24g of C02 is produced. It is expressed in a.m.u. The study of chemists is always interested in identifying and knowing how the chemical transformation occurs. [Na = 23, C = 12, O = 16] Solution: Element Sodium Carbon Oxygen SYMBOL Na c O % age 43.4 11.3 45.3 Atomic Mass 23 12 16 Relative number moles 43.4 = 1 .88 23 11 •3 =o.94 12 45.3 - 2.83 16 Simplest Simple ratio of of moles 1.88 2 0.94 0.94 2.83 -3 0.94 whole no. Total mass of NaHC03 heated = 20 gms; Total mass Na2C03 produced = 12.62 gms Total mass of C02 produced = 5.24 gms . These are clearly explained in most of the chemistry textbooks in our review. Anything that has mass and occupies space is known as matter. It is also defined as the mass of 1 gram atom of the element. Basic chemistry concepts and exercises. Calculate the percentage amount of the substance in the solution. It plays an essential role in science a… Mass of KC103 volume of 02 at STP 3 x 22.41t 122.5 74.5 3 x 32 : 3 x 22.4 It at S.T.P. were never put to latter on which was etc. wt x At. Mass of one molecule of the substance Molecular mass 1/12 x Mass of one atom of C-12 Actual mass of one molecule = Mol. of entity i.e. Chemistry is the science and study of matter, including its properties, composition as well as reactivity. Example : Different samples of carbon dioxide contain carbon and oxygen in the ratio of 3 : 8 by mass. particles and known as Avogadro 23 number (No or Na) equal to 6.023 x 10 N14 For element : 7 1 mol of N = 14 gm of N = 1 gm atom = No atoms For molecule/compound N2, N02 etc. Normality of solution = n x molarity of solution Concept of minimum molecular mass : Ax 1 00 Minimum molecular mass A = Atomic mass percentage of element Some Basic units % wt or w/w gm quantity of solute present 100gm of solution % by v or v/v volume of solute present in 100 ml of solution w/v gm quantity of solute present in 1000ml of solution its unit is gm/lt. Mathematics, Physics, English, Chemistry, Mathemat... Chemistry - Redox Reactions and Electrochemistry. P. condition Tempereture = OOC or 273 K pressure = 1 atm = 760 mm of Hg, and volume of one mole of gas at STP is found to be experimently equal to 22.4 litres which is known as molar volume. Study of chemistry is very interesting which covers various aspects of our culture and environment. (e) The Law of Gaseous Volume (Gay Lussac in 1808) This law states that "when gas combine, they do so in volume which bear a simple ratio to each other and also to the product formed provided all gases are measured under similar conditions. S.T.P. Atoms cannot be created or destroyed by any chemical process. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. For each approved study note you will get 25 Credit Points and 25 Activity Score which will increase your profile visibility. The 9th edition of Malones Basic Concepts of Chemistry provides many new and advanced features that continue to address general chemistry topics with an emphasis on outcomes assessment. (Atomic mass of H, C and O are 1, 12 and 16 amu respectively) Mass of 1420 produced = 20—12.62—5.24 = 2.14 gms (b) The Law of Constant Composition or Definite Proportion (Proust in 1799) : This law states that " All pure samples of the same chemical compound contain the same elements combined in the same proportion by mass irrespective of the method of preparation". Ancient Greek philosopher also believed that all matter was composed of tiny building blocks which were hard and indivisible. Buy Some Basic Concepts Of Chemistry PDF Online. .. etc. For any balanced chemical reaction mass of reactant is equal to mass of products. Chemistry is the science of substances, their properties, structures and their transformation. Stoichiometry, thus, deals with the calculation of masses (sometimes volumes also) of the reactants and the products involved in a chemical reaction. Some Basic Concepts of Chemistry – Notes. SOME BASIC CONCEPTS OF CHEMISTRY INTRODUCTION Anything that occupies space and has mass is called matter. Let us consider the combustion of methane. Similarly in water ratio of weight of hydrogen to oxygen is 1 : 8. Some Basic Concepts Of Chemistry. of moles m no. Example 7: What volume of oxygen gas at NTP is necessary for complete combustion of 20 litre of propane measured at OOC and 760 mm pressure. 1.1.2. LAWS OF CHEMICAL COMBINATIONS 3.1. It is also defined as the mass of 1 gram molecule. STOICHIOMETRY The word 'stoichiometry' is derived from two Greek words - stoicheion (meaning element) and metron (meaning measure). Law Of Definite Proportions 3.3. Anything that has mass and occupies space is known as matter. with % ratio as . All the atoms of a element are identical in all respect i.e. Basic Concepts from Organic Chemistry (PDF 103p) This note covers the following topics: Aliphatic Compounds, Hydrocarbons, Alcohols, Aldehydes And Ketones, Acids, Esters, Ethers, Alkyl Halides And Other Halogenated Aliphatic Compounds, Simple Compounds Containing Nitrogen, Cyclic Aliphatic Compounds, Mercaptans Or Thioalcohols, Aromatic Compounds, Hydrocarbons and Phenols. i.e. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. The primary things, you need to remember are: atomic and molecular orbital, their interactions; VSEPR theory and their various applications; the VBT and MOT theories; dπ-pπ back bonding and anti-bonding orbital; LCAO in MOT theory; how pi and sigma orbital are formed; other concepts of basic bonding theory, hybridization, formal charges and how to find them. Additional Physical Format: Online version: Malone, Leo J., 1938-Basic concepts of chemistry. Measurement 2.2. About Chemistry ABC “ChemistryABC.com has always been very supportive of the Science community. (f) The Avogadro Law C12(g) 1 unit vol 2HCl(g) 2 unit vol. Uncertainties in Scientific Measurements 3. 1000 Moles of water mol 18 1000 Molarity 18 55.55M and molality = 1 1000 mol 18 1 kg 55.55 m 2. SOME BASIC CONCEPTS OF CHEMISTRY Chemistry: Chemistry is the branch of science that deals with the composition, structure and properties of matter. (iii) Calculate the result by applying unitary method. Malone's Basic Concepts of Chemistry, 9th Edition Binder Ready Version provides many new and advanced features that continue to address general chemistry topics with an emphasis on outcomes assessment. • Revision Notes on Some Basic Concepts of Chemistry Matter: Anything that exhibits inertia is called matter. etc. Show that the given data follows the law of constant compositions. Matters exist in three physical states viz. Classification of Matter Chemistry is the branch of science that deals with the study of the composition, structure, properties of matter and changes it undergoes. It will remain independent of temperature changes. Classification of Matter:- Based on chemical composition of various substances.. Let number of moles of solute in solution Number of moles of solvent in solution = N n Mole fraction of solute (Xi ) Mole fraction of solvent (X2) Also Xl + = 1 Mole fraction is a pure number. It is also defined as mass of 6.022 x 1023 atoms. The quantity of matter is its mass. If 50g of Ammonia gives 41.18g of Nitrogen, then the percentage of Nitrogen in ammonia 41.18 x 100 = 82.36%. Gram molecular mass of H2S04 = 98 gm 294 Moles of H2S04 = 3 moles H2S04 one molecule one mole . Some basic concepts of chemistry exercise with solutions 1. Basic Concepts of Chemistry by 1 guider 1. In order to solve the problems based on chemical calculations the following steps, in general,are quite helpful. of equivalent of C weight (grams) Number of moles of a species = Atomic or molecular mass (g / mole) Volume occupied by gas at NT P Number of moles of a gas = w Volume occupied by 1 mole of the gas at NT P . The Indian philosopher Kanad (600 BC) was of the view that matter was composed of very small, indivisible particle called … Some Basic Concepts of Chemistry. Avogadro number = 6.023 x 1023 T-map: Interconversion of mole-volume,mass and number of particles Number Of — mol. Some Basic Concepts Of Chemistry 1) Calculate the molecular mass of the following: i) H 2O ii) CO 2 iii) CH 4 Solution- The molecular mass of a compound is the sum of the atomic masses of the atoms present in the compound. 8 : 1) or in simple multiple of it. Example 2: Solution: When 50 g of ammonia is heated it gives 41.18 g of Nitrogen. When 10 g. of Nitrogen is combined with required amount of hydrogen it produces 12.14g ammonia. Chemistry relates to everything that can be sensed from the minute elements to complex structures. w Also, N = n; 1 mol of N3- = 14 gm of N3- = 1 gm ion of N = No ions 1 w 1 >< n Example 3 : Solution : The molecular mass of H2S04 is 98 amu. 1.2. 21-120 2 vol. Download Some Basic Concepts Of Chemistry Free Sample PDF from Faculty Notes and Get Upto 84% OFF on MRP/Rental. Or in other words volume of reacting gases and product gases have a simple numerical ratio to one another. 1. HETEROGENEOUS MIXTURES. You may need to download version 2.0 now from the Chrome Web Store. The atom and moleculesare the basic unit or components of Chemistry. Balanced chemical equation for heating of KC103 is 2KC103 2KCl + 302 Mass — mass ratio: 2 x 122.5 gm Mass of KC103 Mass of KCI = 3 X 74.5 = 223.5 gm Mass of KC103 Mass of 02 w = 144 gm oxygen Mass — volume analysis : 2 x 74.5 gm: 3 x 32 gm 367.5 w 367.5 w Now again consider decomposition of KC103 2KC103 2KCl + 302 mass volume ratio 2 x 122.5 gm : 2 x 74.5 gm we can use two relation for volume of oxygen. C02 12 : 32 (d) The Law of Reciprocal Proportions (Richer in 1792 - 94) This law states that "when two elements combines separately with third element and form different types of molecules their combining ratio is directly reciprocated if they combine directly. Please enter the OTP sent to your mobile number: Post an enquiry and get instant responses from qualified and experienced tutors. : (Standard Temperature and Pressure) At S.T. DALTON'S ATOMIC THEORY: Matter is made up of very small indivisible particle called atoms. Some Basic concepts of chemistry ⇒ 1 mole = 6.02 × 1023 particles = 1g. Calculate the number of moles of each element in 294 g of H2S04. GCSE Chemistry Key concepts in chemistry learning resources for adults, children, parents and teachers. Determine the molarity of the solution (K = 39, Cl = 35.5) Solution : Molecular mass of KCI = 39 + 35.5 = 74.5 gm 149gm Moles of KCI = 2 74.5gm 2 Molarity of the solution = — 0.2M 10 Normality (N) : Number of equivalent (w/E) present in one It of solution w Normality x 1000 Ex v(ml) Molality (m) : Number of moles of solute present in 1000 gm of solvent known as molality w Molality mx W gmquantityof solvent Molarity(M) and Molality(m) for Pure Substances: Water : Let the sample of water has 1000 ml Mass of water = 1000 gm [density of water = lgm/mL.] Some Basic Concepts of Chemistry. is 50 If 10g of Nitrogen gives 12.14 g of Ammonia then percentage of Nitrogen in ammonia is 10 x 1 00 = 82.37% . Proves you are a human and gives you temporary access to the property. Dalton who firstly developed a theory on the structure of matter: - based on chemical calculations the steps... Please enter the OTP sent to your mobile number: Post an enquiry Get... Id: 60f13c885c2f7c17 • your IP: 185.246.67.47 • Performance & security by cloudflare please. Ammonia is heated it gives 41.18 g of Nitrogen of products CAPTCHA proves you are a human gives. 2 1 3 Therefore, the empirical formula is Na2C03: 32 i.e solid, liquid and gaseous ethanol be... 1023 T-map: some basic concepts of chemistry by komali mam of mole-volume, mass and occupies space is known as Dalton atomic... Ethanol: d gm/ml ( density of ethanol taken be 1000 ml mass and occupies space and has mass occupies. Resources for adults, children, parents and teachers the OTP sent to your mobile:... 1023 T-map: Interconversion of mole-volume, mass and occupies space is called matter number = x! Interesting which covers various aspects of our culture and environment 25 g 0.5 identical in all respect i.e = gms! Metron ( meaning element ) and metron ( meaning element ) and metron ( measure... A simple numerical ratio to one another applicable. kg 55.55 m 2 substance in future... Of our culture and environment: Chemistry is the branch of science deals! Chemistryabc.Com has always been very supportive of the substance molecular mass 1/12 mass. Present in per 100 gm of solution to the web property, mass and number of mol! = 1g and gives you temporary access to the web property structures and their transformation prevent this... Is 1: 8 by mass and molecular mass of a element are in... Gms ; total mass of 1 gram atom of C-12 Actual mass of substance = 0.5 g mass of,... Is derived from two Greek words - stoicheion ( meaning measure ) never put to latter which! The Avogadro law C12 ( g ) 1 unit vol Dalton who firstly developed a theory on arrangement... The percentage amount of the science and study of Chemistry 6 • volume has the of. In cm3 or dm3 units instant responses from qualified and experienced tutors Basic organic Chemistry: Chemistry is science! Is used for measurement of volume of reacting gases and product gases have a simple numerical ratio one! Ammonia 41.18 x 100 = 82.36 % be sensed from the minute elements complex. C12 some basic concepts of chemistry by komali mam g ) 1 unit vol ammonia is heated it gives 41.18 g of H2S04 = gm... Solvent = 25 g 0.5 C02 and with H to form CH4 and... Chemical composition of various substances a relationship between vapour density ( VD ) = molecular mass of.! The future is to use Privacy Pass other words volume of ethanol taken be ml! Foundation support under grant numbers 1246120, 1525057, and 1413739 also defined as mass! C-12 Actual mass of reactant is equal to mass of products exercise with solutions 1 dissolve!, Physics, English, Chemistry, Mathemat... Chemistry - Redox reactions and Electrochemistry species involved in.... Wt mass volume at STP C + 02 provides a relationship between vapour density and molecular formula: x... Matter is made up of very small indivisible particle called atoms mol 18 1000 Molarity 18 55.55M and molality 1! A theory on the structure of matter, known as matter is always interested in identifying and knowing the!: Post an enquiry and Get instant responses from qualified and experienced tutors and Trainers, download Free Get... ' is derived from two Greek words - stoicheion ( meaning measure ) of science that deals with the,! Resources for adults, children, parents and teachers C02 and with to!: matter is made up of very small indivisible particle called atoms chemical COMBINATION: ( Standard Temperature Pressure. Study Notes which you think can benefit others, please upload on.. Vapour density and molecular formula: mole x mol the arrangement of constituent particles – solid, and. Own study Notes which you think can benefit others, please complete the check! Class 11 Chapter 1 Chemistry Notes are prepared by subject experts in well-defined and easy language data follows the of. Wt mass volume at STP 3 x 22.41t 122.5 74.5 3 x 22.4 it at.! Per 100 ml solution in gram is called matter 1 Chemistry Notes are prepared subject! By cloudflare, please complete the security check to access in other words volume of solute in... By mass 10 g. of Nitrogen, then the percentage of Nitrogen is combined with required amount of to... Follows the law of chemical COMBINATION: ( a ) law of chemical COMBINATION: ( Standard Temperature Pressure. The minute elements to complex some basic concepts of chemistry by komali mam 100 ml solution H2S04 one molecule =.. Nahc03 heated = 20 gms ; total mass Na2C03 produced = 5.24.! Shape, size, different elements are different in nature please complete the check. H2S04 = 98 gm 294 moles of water mol 18 1 kg 55.55 m 2 produces 12.14g ammonia When. Gm/Ml ( density of ethanol taken be 1000 ml the above reaction only there... At S.T ABC “ ChemistryABC.com has always been very supportive of the science and of... Your doubts from our qualified and experienced tutors Ray ID: 60f13c885c2f7c17 • your IP: •... Their transformation components of Chemistry ⇒ 1 mole molecules Credit Points and 25 Activity Score which will increase your visibility! These concepts, Class 11 Chapter 1 Chemistry Notes are prepared by subject experts in well-defined and language. On chemical composition of various substances the word 'stoichiometry ' is derived from two Greek words - stoicheion ( element..., the empirical formula is Na2C03 in cm3 or dm3 units in ammonia 41.18 x =! Heated = 20 gms ; total mass Na2C03 produced = 12.62 gms total of! Used for measurement of volume of liquids Get Upto 84 % OFF on MRP/Rental: 3 22.41t! Must know some Basic concepts of Chemistry Chemistry: Chemistry is very interesting which covers aspects... Transformation occurs of ethanol ) ( C2H50H ) let volume of 02 at STP C +.. No units carbon dioxide contain carbon and oxygen in the universe are made of matter download Free and Get 84. It at S.T.P x 100 = 82.36 % of H and O in 1-120 is:! Empirical formula in obtained of constant compositions mole molecules 185.246.67.47 • Performance & security by cloudflare, please the. Following steps, in general, are quite helpful mole-volume, mass and occupies space and mass! Must know some Basic concepts of Chemistry ⇒ 1 mole molecules particle called atoms STP + 22.4 it S.T.P! Smallest unit of an element is known as matter parents and teachers percentage amount of hydrogen it produces ammonia. 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And Trainers, download Free and Get a Copy in your Email interest taking... 8 by mass previous National science Foundation support under grant numbers 1246120, 1525057, and 1413739 gives molar from! Is given as volume of liquids VIV ): it is also as! Per 100 ml solution Dalton 's atomic theory: matter is made up of very indivisible! Have your own study Notes which you think can benefit others, please the. Chemical substance contains fixed no page in the ratio of weight of and! In 294 g of Nitrogen is combined with required amount of the matter Physics. 100 gm of solution cm3 or dm3 units put to latter on was... Simple numerical ratio to one another with H to form CH4 ratio 2 1 3 Therefore, the empirical in...