Science > Chemistry > Molecule and Molecular Mass > Calculation of Number of Moles and Molecules In this article, we shall solve problems to calculate number of moles and number of molecules and atoms present in given quantity of a substance. Example 01: 3.49 g of ammonia at STP occupies 4.48 dm3. Calculate molar mass […]
Category: Physical Chemistry
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Hydrolysis Constant
Science > Chemistry > Physical Chemistry > Ionic Equilibria > Hydrolysis Constant In this article, we shall study hydrolysis of different types of salts and we shall derive expression for hydrolysis constant for each type of salt. Hydrolysis of salt of strong acid and weak base. These salts on hydrolysis produce strong acids and weak […]
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SP Hybridization
Science > Chemistry > Physical Chemistry > Nature of Chemical Bond > sp Hybridization The mixing of one s – orbital and one p – orbital of the same atom of nearly same energy to form a set of diagonally arranged two identical hybrid orbitals of equivalent energy is called sp hybridization. These hybrid orbitals […]
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SP2 Hybridization
Science > Chemistry > Physical Chemistry > Nature of Chemical Bond > sp2 Hybridization Mixing of one ‘s’ orbital and two ‘p’ – orbitals of nearly same energy forming set of trigonally arranged three identical orbitals of equal energy is known as sp2 hybridization. Geometry sp2 Hybridization: The hybrid orbitals are arranged around the central atom in a […]
Science > Chemistry > Atomic Structure > Problems on Calculation of Number of Electrons, Protons, and Neutrons In this article, we shall study to solve problems on the calculations of the number of electrons, protons, and neutrons in atoms, molecules, and species. Example 01: Calculate the charge and mass of 1 mole of electrons. Solution: […]
Science > Chemistry > Atomic Structure > Problems Based on Atomic Number, Mass Number, and Neutron Number In this article, we shall study to solve problems based on the calculation of atomic number, atomic mass number, and neutron number Atomic number (Z) : The number of protons (positive charge) present in the nucleus of an […]
Science > Chemistry > States of Matter > Charle’s Law Mathematical relationships between volume, pressure, and temperature of a given mass of gas are referred to as Gas laws. In this article. we shall study Pressure-Temperature relation or Gay-Lussac’s law. Gay-Lussac’s Law: Statement: At constant volume the pressure of a given mass of a gas […]
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Particle Model of Matter
Science > Chemistry > States of Matter > Introducion A matter is defined as anything that has mass, which occupies space and may be perceived by senses. There are three states of matter, viz. (a) solid, (b) liquid, and (c) gaseous states. Whatever may be the state of matter, it is composed of particles. In […]
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Properties of Substance
Science > Chemistry > Introduction to Chemistry > Properties of Substance All matter has physical and chemical properties. Extensive properties are those properties of a substance which depend on the amount of substance. They vary with the amount of the substance. Examples: Mass, weight, and volume. Intensive properties are those properties of a substance which do not depend […]
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Atomic Radius
In this article, we shall discuss a very important periodic property called the atomic radius. Atomic Radius: The size of an atom is very small (120 pm). Secondly, since the electron cloud surrounding the atom does not have a sharp boundary, the determination of the atomic size cannot be precise. One practical approach of finding the size of an atom of […]