Question

Classify aqueous solutions of the following substances according to their pH into three groups : 7, more than 7, less than 7.
Common salt, sodium acetate, hydrochloric acid, carbon dioxide,potassium bromide, calcium hydoxide,ammonium chloride, vinegar, sodium carbonate, ammonia, sulphur dioxide.

Answer 1

Common salt-- 7
sodium acetate-- less than 7
hydrochloric acid-- less than 7
carbon dioxide-- less than 7
potassium bromide-- 7
calcium hydoxide-- more than 7
ammonium chloride-- less than 7
vinegar-- less than 7
sodium carbonate-- more than 7
ammonia-- 7
sulphur dioxide-- less than 7

Answer 2

pH 7:potassium bromide,
pH more than 7: common salt, calcium hydroxide, sodium carbonate,
pH less than 7: hydrochloric acid, sodium acetate, carbon dioxide, ammonium chloride, vinegar, sulphur dioxide.