Question

While preparing dilute sulphuric acid from concentrated sulphuric acid in laboutry the concentrated sulphuric acid is added slowly to water with constant stirring because?

Answer 1

Hello Dear.

Here is the answer---


While Preparing Dilute Sulphuric Acid in a Laboratory, Acid is added slowly to water (Water is never added to the acid as it will be the exothermic process which can cause Fatal to the person) with constant stirring because it will not cause any harm to the Person or any Apparatus in the laboratory.

If water is directly added to the acid then there will be sudden increase in temperature and the acids being in bulk tends to spurts out with serious Consequences.


Hope it helps.

Have a Nice Day.

Answer 2

1} The preperation of dil. sulpheric acid falla in the category of extreme exothermic reaction process.
2} During the preperation of dil. sulpheric acid, the large amount of water is taken in the container surrounded by ice. Cool it for 20 mins. Now small quantity of conc. H2SO4 is added in slowl with stirring. Therefore, only a small amount of heat is liberated at a time. In this way dil. Sulpheric acid is prepared
3} On the other hand, in the process od dilution of conc. Sulpheric acid with water, very large amount of heat is liberated. As a result, water gets evapourated instantaneously., if it is poured in to conc. H2SO4 which may cause an accident