Question

while diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?​

Answer 1

If you add water to acid it forms an extremely concentrated solution of acid initially. So much heat is released that the solution may boil very violently, splashing concentrated acid out of the container and all this because the reaction is exothermic. So it is always safer to add acid to water, and not water to acid.

Answer 2

when water is added to acid then the acid might spill on our face due to high exothermic reaction but when the acid in water the water absorbs the acid

so it is preferred to add acid to water than adding water to acid

hope this helps you.....