Question

for dilution the acid, acid is added to water and not water to acid.

Answer 1

When we will add water to acid so much heat will be released that the solution May boil very violently, splashing concentrated acid out of the container and all this will turn the reaction to exothermic one. On the other hand when we will add acid to water the solution form will be very dilute and the small amount of heat released is not enough to vaporize it.

Answer 2

Diluted acid solutions are normal concentrated acid solutions with added water in order to decrease the concentration.

For the dilution process of acid we slowly add the acid in the water and we don't use the reverse procedure. (Adding water in the acid)

Because,when we add water in the acid , an enormous amount of heat is generated which helps to boil the acid.

This can also cause injuries.