What Is The Method Of Preparation Of Sodium Sulfate?

Sodium sulfate can be prepared by several methods, but one of the most common is the reaction between sodium hydroxide and sulfuric acid. This reaction produces sodium sulfate and water as the products:

2 NaOH + H2SO4 → Na2SO4 + 2 H2O

Another method for preparing sodium sulfate involves reacting sodium chloride with sulfuric acid and then evaporating the resulting solution to dryness. The solid residue that forms is sodium sulfate:

NaCl + H2SO4 → NaHSO4 + HCl

NaHSO4 + NaCl → Na2SO4 + HCl

In both methods, the purity of the final product can be improved by recrystallization from a solvent such as water.