Give scientific reasons.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
When concentrated sulphuric acid is diluted with water, a very large amount of heat is released. It is very dangerous and can cause accident.
⇒ To avoid this, a required amount of water is taken in a beaker.
⇒ Small quantity of sulphuric acid is added into the water.
⇒ Constant stirring has to be done to decrease the releasing heat.
⇒ As a result, only a small amount of heat is released.
Note: In chemical labs, it always advised that we should add acid in water, not water in acid.
