Question
How is a solution of $H _2 SO _4$ prepared from concentrated sulphuric acid solution?
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Answer
Concentrated $H_2SO_4$ dissolves in water with the evolution of a large amount of heat.
Generally a dilute solution is prepared by adding water to the concentrated solution.
In case of concentrated $H_2SO_4$, since its specific gravity is higher, the added water remains on the surface of it and due to evolution of heat, a glass vessel cracks at the interface.
Hence concentrated $H_2SO_4$_ must be added slowly into fine stream of water with constant stirring to obtain a dilute $H_2SO_4$ solution.
Generally a dilute solution is prepared by adding water to the concentrated solution.
In case of concentrated $H_2SO_4$, since its specific gravity is higher, the added water remains on the surface of it and due to evolution of heat, a glass vessel cracks at the interface.
Hence concentrated $H_2SO_4$_ must be added slowly into fine stream of water with constant stirring to obtain a dilute $H_2SO_4$ solution.
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