Answer :

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.



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