Question

Explain the following phenomenon by means of balanced equation :
(a) When the solution (b) is heated, turbidity reappears.
(b) The turbidity of solution (a) eventually disappears when continued exhaling is made through it.
(c) When the solution (b) is heated, turbidity reappears.

Answer 1

(a) $Ca(OH{)}_2+C{O}_2\to CAC{O}_3\downarrow +H_{2}O$
Lime water Exhaling gas Insoluble
(b)$CaC{O}_3+C{O}_2+H_{2}O\to Ca(HC{O}_3{)}_2$
(soluble).
(c)$Ca(HC{O}_3{)}_2\stackrel{\Delta }{\to }CaC{O}_3+H_{2}O+C{O}_2$
Insoluble