Question

Why is it advised to put acid into water, not water into acid? Explain. What will happen to the concentration of an acid on dilution?

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.Concentration of acid reduces on dilution

Answer 2

Hi,

Here is your answer

Dilution of an acid is a highly exothermic reaction. Adding water directly to the acid may cause the container to break and the liquid to splash out because of the intense heat produced. Hence, it is always adviced to add acid to water while stirring continously.

Diluting an acid reduces the strength of the acid. Adding water to an acid reduces the concentration of H+ ions in it and the acid becomes less acidic.

Hope this helps you.