Question

Can we add water directly in concentrated acid to make it dilute . Give reason.

Answer 1

Always acid should be added to water drop by drop with continuous stirring.

Answer 2

We do not add water into acid instead of that we add acid into water step by step by a dropper.  

It is because acid is too vigorous  when we put water into acid they give lots of heat and even burst on us. So we put acid into water