Question

while diluting a concentrated acid why it is recommended that the acid should be added to water and water not to the acid

Answer 1

when concentrated acid is added to water a vigorous reaction takes place . that is exothermic process as a lot of heat produced which can splash out and can damage what comes in its touch

Answer 2

Explanation:

Since the process of dissolving an acid in water is exothermic, it is always recommended that acid should be added to water. If it is done the other way, then it is possible that because of the large amount of heat generated, the mixture splashes out and causes burns.