Question

Describe the chemical reaction of chlorine with

a). dry slaked lime 

b). aqueous solution of hot calcium hydroxide

Answer 1

(a) Chlorine when reacts with dry slaked lime bleaching powder is obtained.

Ca (OH)₂ + Cl₂ → Ca (OCl) Cl + H₂O 

(b) When chlorine reacts with hot and conc. Solution of NaOH, a mixture of sodium chloride and sodium chlorate is obtained.

6 NaOH + 3Cl₂ → 5NaCl + NaClO₃ + 3H₂O