Empirical Formula and Molecular Formula
Empirical Formula and Molecular Formula:
An empirical formula represents the simplest whole number ratio of various atoms present in a compound.
The molecular formula shows the exact number of different types of atoms present in a molecule of a compound.
Chemical Equation:
Representation of a chemical change in terms of symbols and formulae of the substances involved in the reaction is called chemical equation.
Limiting Reagent:
The reactant which gets consumed first or limits the amount of product formed is known as limiting reagent.
Concentration of Solutions:
Mass Percent:
Mass Percent is the mass of the solute in grams per 100 grams of the solution.
A 3% solution of sodium chloride means that 3 g of NaCl is present in 100 g of the solution.
Volume Percent:
Volume percent is the number of units of volume of the solute per 100 units of the volume of solution.
A 4% (v/v) solution of ethyl alcohol contains 4 cc of alcohol in 100 cc of the solution.
Molarity:
Molarity of the solution is defined as the number of moles of solute dissolved per litre of the solution.
Molality:
Molality is the the number of moles of solute present in 1 kg of solvent.
Mole Fraction:
Mole fraction is the ratio of number of moles of a particular component to the total number of moles of the solution.
Study Material