Question

The reaction of slaked lime with $C{l_2}$ gas gives:
A. only $Ca{(OCl)_2}$
B. only $CaC{l_2}$
C. a mixture of $Ca{(OCl)_2},Ca{(OH)_2},CaC{l_2},{H_2}O$
D. quick lime

Answer 1

The compound slaked lime is an inorganic compound. Its molecular formula is $Ca{(OH)_2}$. It is in a crystalline state and is colorless. It is prepared by reacting calcium oxide with water. The compound calcium oxide is known as quick lime.

Complete step by step answer:
The IUPAC name of slaked lime is calcium hydroxide. The compound calcium hydroxide is prepared by slaking calcium oxide with water.
The chemical reaction for the preparation of slaked lime is shown below.
$CaO + {H_2}O \to Ca{(OH)_2}$
In the above reaction, calcium oxide reacts with water to form calcium hydroxide.
When chlorine gas is reacted with slaked lime it forms a bleaching agent named calcium hypochlorite.
The reaction of slaked lime with chlorine is shown below.
$2Ca{(OH)_2}(s) + 2C{l_2}(g) \to Ca{(ClO)_2}(s) + CaC{l_2}(s) + 2{H_2}O(l)$
In this reaction, calcium hydroxide reacts with chlorine to give calcium hypochlorite, calcium chloride, and water.
Therefore, the correct option is C.

Additional information: The compound calcium hypochlorite is also called bleaching powder. It has disinfectant properties thus used to clean water present in the swimming pool and also in disinfecting water for drinking purposes. It is also used as an oxidizing agent in many industries. Its other uses are in the production of chloroform.

Note:
Calcium hypochlorite is usually present in two forms, one is the dry calcium hypochlorite and the other one is anhydrous hypochlorite. The bleaching powder is generally the mixture of the dibasic form of calcium hypochlorite ($CaC{l_2}.2Ca{(OH)_2}$) and the dibasic form of calcium chloride ($CaC{l_2}.2Ca{(OH)_2}$).