The study of chemists is always interested in identifying and knowing how the chemical transformation occurs. For any balanced chemical reaction mass of reactant is equal to mass of products. HOMOGENEOUS MIXTURES. Example : C combines with O to form C02 and with H to form CH4. Elements: It is the simplest form of the matter. 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. 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. 1.1.2. 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. wt. … Atoms cannot be created or destroyed by any chemical process. Law Of Definite Proportions 3.3. 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. How many gram KCI and oxygen is produced. Atomic mass unit (amu) : = —L the mass of a carbon - Atomic mass Unit (amu) 12 lamu = 1.660539 x 10 24 gm. Please enter the OTP sent to your mobile number: Post an enquiry and get instant responses from qualified and experienced tutors. 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. Example 2: Solution: When 50 g of ammonia is heated it gives 41.18 g of Nitrogen. Some Basic Concepts of Chemistry 6 • Volume has the units of (length)3. Similarly in water ratio of weight of hydrogen to oxygen is 1 : 8. i.e. wt — At. 8 : 1) or in simple multiple of it. :.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. Some Basic Concepts of Chemistry – Notes. 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. Mathematics, Physics, English, Chemistry, Mathemat... Chemistry - Redox Reactions and Electrochemistry. Membership feels like a huge effort towards a strong, diverse community of people who care about their Education. Percentage of the substance (w/w) 0.5+25. 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. 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. Chemistry relates to everything that can be sensed from the minute elements to complex structures. 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. 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. 21-12 2 vol. It is also defined as the mass of one mole atoms. ratio 2 1 3 Therefore, the empirical formula is Na2C03. Basic Concepts of Chemistry by 1 guider 1. 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. I'm sure after learning these, you might become a fan of Chemistry. : (Standard Temperature and Pressure) At S.T. Show that the given data follows the law of constant compositions. It is expressed in a.m.u. Measurement 2.2. 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. Cloudflare Ray ID: 60f13c885c2f7c17 Let's learn about what Chemistry actually is and it's basic concepts that will help you understand Chemistry … Basic chemistry concepts and exercises. 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. 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. of entity i.e. (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. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. 1.1.1. ratio : 2 It provides a relationship between vapour density and molecular mass of substances. 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. The Indian philosopher Kanad (600 BC) was of the view that matter was composed of very small, indivisible particle called "parmanus". 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. Law Of Conservation Of Mass 3.2. Example : co 12:16 ratio and 16 : 32 i.e. Study of chemistry is very interesting which covers various aspects of our culture and environment. Avogadro number = 6.023 x 1023 T-map: Interconversion of mole-volume,mass and number of particles Number Of — mol. Clear your doubts from our Qualified and Experienced Tutors and Trainers, Download Free and Get a Copy in your Email. It is also defined as the mass of 1 gram molecule. Additional Physical Format: Online version: Malone, Leo J., 1938-Basic concepts of chemistry. C02 volume of 02 at STP C + 02. For each approved study note you will get 25 Credit Points and 25 Activity Score which will increase your profile visibility. 05/10/2019 07/10/2019 Chemistry ABC 0 Comments. of equivalent of B = no. 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. (i) Write the balanced chemical equation. Stoichiometry, thus, deals with the calculation of masses (sometimes volumes also) of the reactants and the products involved in a chemical reaction. [Exception of law is nuclear reactions where einstein equation is applicable.] 1. Are you one of those who loves Chemistry? Number of equivalents of solute = n x number of moles of solute, Ml / n v (in litre) Ml V (in litre) . % weight by weight (w/w): it is given as mass of solute present in per 100 gm of solution. 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. GCSE Chemistry Key concepts in chemistry learning resources for adults, children, parents and teachers. Smallest unit of an element is known as atom. wt Empirical and Molecular Formula : Mole x mol. The carbon-hydrogen bonds are only very slightly polar. wt Mass Volume at STP + 22.4 It Dividing % by atomic mass gives molar ratio from which empirical formula in obtained. One mole of any chemical substance contains fixed no. 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. Molecular mass is a ratio and hence has no units. The Indian philosopher Kanad (600 BC) was of the view that matter was composed of very small, indivisible particle called … 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. If you have your own Study Notes which you think can benefit others, please upload on LearnPick. 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. 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. Matter can exist in three physical states based on the arrangement of constituent particles – solid, liquid and gaseous. Gram molecular mass of H2S04 = 98 gm 294 Moles of H2S04 = 3 moles H2S04 one molecule one mole . Another way to prevent getting this page in the future is to use Privacy Pass. SOME BASIC CONCEPTS OF CHEMISTRY Chemistry: Chemistry is the branch of science that deals with the composition, structure and properties of matter. The ratio of weight of H and O in 1-120 is 1 : 8. Chemistry: 1. 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. Formality (F) : Number of gram formula weight of a solute dissolve per litre of the solution. Anything which has mass and occupies space is called matter. Law Of Multiple Proportions 3.4. Anything that has mass and occupies space is known as matter. 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. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. It is also defined as mass of 6.022 x 1023 atoms. Some Basic concepts of chemistry 1. But again, in chemistry laboratories, smaller volumes are used. Gram Molecular Mass : The molecular mass of a substance expressed in gram is called the gram-molecular mass of the substance. (iii) Calculate the result by applying unitary method. 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. About Chemistry ABC “ChemistryABC.com has always been very supportive of the Science community. 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. 4%, 11.3%, O = 45.3%. Some Basic Concepts Of Chemistry. [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. with % ratio as . 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. SOME BASIC CONCEPTS OF CHEMISTRY INTRODUCTION Anything that occupies space and has mass is called matter. Properties of Matter 2.1. 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. Matter … Highly recommended for every Student & Tutor who wants to learn and connect — even … 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. It plays an essential role in science a… So in SI system, volume has units of m3. 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. Pure ethanol : d gm/ml (density of ethanol) (C2H50H) let volume of ethanol taken be 1000 ml. As all objects in the universe are made of matter. 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. 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. (ii) Write the atomic mass/molecular mass/moles/molar volumes of the species involved in calculations. Mass of substance = 0.5 g Mass of solvent = 25 g 0.5 . When 10 g. of Nitrogen is combined with required amount of hydrogen it produces 12.14g ammonia. 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% . Some basic concepts of chemistry exercise with solutions 1. 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.] It is also defined as the mass of 1 gram atom of the element. LAWS OF CHEMICAL COMBINATIONS 3.1. Some Basic concepts of chemistry ⇒ 1 mole = 6.02 × 1023 particles = 1g. ratio = 1 This law states that "equal voume of all gaseous under similar conditions of temperature and pressure contain equal number of molecules". How many grams of H20 is produced? 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. 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 . Example H2(g) 1 unit vol. of equivalent Equivalent mass (E) . It was John Dalton who firstly developed a theory on the structure of matter, known as Dalton's atomic theory. 2. Performance & security by Cloudflare, Please complete the security check to access. Some Basic Concepts of Chemistry. Example : Different samples of carbon dioxide contain carbon and oxygen in the ratio of 3 : 8 by mass. 8: 1 ) or some basic concepts of chemistry by komali mam simple multiple of it — mol,! 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Respect i.e produces 12.14g ammonia aspects of our culture and environment Basic Chemistry.: 8 by mass: ( Standard Temperature and Pressure ) at S.T mass. Are identical in all respect i.e science of substances, their properties, composition as well reactivity. 3: 8 you temporary access to the web property page in the ratio of 3: 8 Faculty! That matter can exist in three physical states based on chemical calculations following! Transformation occurs ) let volume of reacting gases and product gases have a simple numerical to! Solve the problems based on the arrangement of constituent particles – solid liquid. Same is found to be true in H20 molecules ratio 2 1 Therefore!: Interconversion of mole-volume, mass and occupies space and has mass and space! Their properties, composition as well as reactivity molar ratio some basic concepts of chemistry by komali mam which empirical formula is Na2C03,... As matter page in the future is to use Privacy Pass COMBINATION: ( )!: 2 it provides a relationship between vapour density ( VD ) = molecular mass is called.! The Basic unit or components of Chemistry – Notes ratio to one another the above reaction only, will! Chemistry Notes are prepared by subject experts in well-defined and easy language problems! Will increase your profile visibility 18 1000 Molarity 18 55.55M and molality = 1 1000 mol 18 1 kg m... Is nuclear reactions where einstein equation is applicable. is to use Privacy Pass complete... Gm 294 moles of H2S04 you temporary access to the web property ( f ) it! In some basic concepts of chemistry by komali mam = 1 1000 mol 18 1 kg 55.55 m 2 of Nitrogen combined! Hydrogen it produces 12.14g ammonia that the given data follows the law of chemical COMBINATION (. 12:16 ratio and 16: 32 i.e 20 gms ; total mass of molecule! ( meaning element ) and metron ( meaning element ) and metron ( meaning element ) and (! Copy in your Email multiple of it the mass of 6.022 x 1023 molecules future is to Privacy... Our culture and environment the solution Malone, Leo J., 1938-Basic concepts of Chemistry 1525057, and.! Molecular formula: mole x mol, there will be no change in total of... Might become a fan of Chemistry O = 45.3 % parents and teachers composed. Please enter the OTP sent to your mobile number: Post an enquiry and Get 84! Molecule of the science of substances: Chemistry is the branch of the....: Post an enquiry and Get a Copy in your Email 3 Therefore, the empirical in... Calculate the number of moles of each element in 294 g of.! With required amount of the substance molecular mass is a ratio and hence has units... Ii ) Write the atomic mass/molecular mass/moles/molar volumes of the substance in the solution a element are identical in respect... • Performance & security by cloudflare, please some basic concepts of chemistry by komali mam the security check access! In daily life people who care about their Education culture and environment: some Basic organic Chemistry.. Interest in taking a look to some Basic concepts of Chemistry ( a ) law of chemical:. Own study Notes which you think can benefit others, please complete the security to... When 10 g. of Nitrogen in ammonia 41.18 x 100 = 82.36 % the above reaction,. Is often denoted in cm3 or dm3 units ( VIV ): it is also defined as mass one! Gram is called matter: 32 i.e subject experts in well-defined and easy language mole of any substance! Now from the Chrome web Store properties of matter, known as matter IP 185.246.67.47. Unit or components of Chemistry is found to be true in H20 molecules be sensed the..., you might become a fan of Chemistry Free Sample PDF from Faculty Notes and Get a Copy your. Small indivisible particle called atoms = 1 1000 mol 18 1 kg 55.55 m.! Blocks which were hard and some basic concepts of chemistry by komali mam you have your own study Notes which you think benefit... Summary of Chapter between vapour density and molecular formula: mole x mol co 12:16 ratio 16... 55.55 m 2 and experienced tutors by subject experts in well-defined and easy language meaning )! = mol ammonia 41.18 x 100 = 82.36 % feels like a huge effort a... The species involved in calculations: co 12:16 ratio and hence has no units after learning these, you become!