<u>Molarity and normality describe the numbers (moles) of reactants or products dissolved in one liter of solution.</u> Molarity: M = moles of solute contained in one liter of solution. ... <u>Normality is always a multiple of molarity. It describes the “equivalent” moles of reactants involved in chemical reactions.</u>
Explanation:
Normality is a measure of concentration equal to the gram equivalent weight per litre of solution. Gram equivalent weight is the measure of the reactive capacity of a molecule. The solute's role in the reaction determines the solution's normality. Normality is also known as the equivalent concentration of a solution.
Molar concentration is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of amount of substance per unit volume of solution.
The heat energy breaks down the bonds between the molecules of the solid so the molecules become looser. Further hearing of the liquid causes the bonds to be broken down and the molecules will move further apart.