A solution of sodium carbonate is easier to calculate the pH than sodium hydrogen carbonate because there is only one hydrolysis reaction instead of two.

Question

Quizplus · Accepted Answer

Sodium carbonate, Na2CO3, undergoes hydrolysis to form one hydroxide ion and one carbonate ion, resulting in a basic solution. Sodium hydrogen carbonate, NaHCO3, undergoes two hydrolysis reactions, first forming one hydroxide ion and one bicarbonate ion, then the bicarbonate ion further hydrolyzing to form one more hydroxide ion and one carbonic acid molecule, resulting in a more complex pH calculation.

A Solution of Sodium Carbonate Is Easier to Calculate the PH