A. Dry pellets of a base ‘X’ when kept in open absorbs moisture and turns sticky. The
compound is also formed by the chlor-alkali process. Write chemical name and formula of X.
Describe a chlor-alkali process with a balanced chemical equation. Name the type of reaction
occurs when X is treated with dilute hydrochloric acid. Write the chemical equation.
B. While diluting an acid, why is it recommended that the acid should be added to water and not
water to the acid?
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A large amount of heat is released when strong acids are mixed with water. Adding more acid releases more heat. If you add water to acid, you form an extremely concentrated solution of acid initially. So much heat is released that the solution may boil very violently, splashing concentrated acid out of the container! If you add acid to water, the solution that forms is very dilute and the small amount of heat released is not enough to vaporize and spatter it. So Always Add Acid to water, and never the reverse.
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