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Class 12th Chemistry
- Solutions1. What is the pH of 0.1 M solution of sodium acetate?The pH of a 0.1 M solution of sodium acetate is 4.75.
Notes1. Atomic Structure:• Atomic structure is the study of the components of an atom and its organization.• It includes the protons, neutrons, electrons and the force that binds them together.• It also involves the study of the various subatomic particles and their properties.2. Chemical Bonding:• Chemical bonding is the force that holds atoms and molecules together.• It is the result of the attraction between the positively charged nucleus of one atom and the negatively charged electrons of another atom.• Types of chemical bonds include covalent, ionic, hydrogen and metallic.3. Chemical Reactions:• Chemical reactions are processes that involve the breaking and forming of bonds between atoms.• They can result in the creation of new substances or the transformation of existing substances.• Reactions occur when the energy of the reactants is greater than the energy of the products.4. Chemical Equilibrium:• Chemical equilibrium is the state in which the concentrations of reactants and products remain constant over time.• It occurs when the forward and reverse reactions occur at the same rate.• Equilibrium can be affected by changes in temperature, pressure or the concentration of reactants or products.5. Solutions and Colloids:• Solutions are homogeneous mixtures of two or more substances.• Colloids are mixtures of two or more substances in which one substance is dispersed in the other.• Solutions and colloids can be classified as either gaseous, liquid or solid.
Class 12th Chemistry Online Group Live Class (CBSE)
Classification of solids based on different binding forces −
Molecular
Ionic
covalent and metallic solids
amorphous and crystalline solids (elementary idea)
Unit cell in two dimensional and three dimensional lattices
Calculation of density of unit cell
Packing in solids
Packing efficiency
Voids
Number of atoms per unit cell in a cubic unit cell
Point defects
Electrical and magnetic properties
Band theory of −
Metals
Conductors
Semiconductors
Insulators
n & p type semiconductors
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