Chemistry - Complete s-block Question with Solution | TestHub

The sodium salt of bicarbonate ($HC{O}_3^{-}$) reacts with $MgC{l}_2$ to form soluble magnesium bicarbonate. Upon heating, magnesium bicarbonate decomposes to form insoluble magnesium carbonate ($MgC{O}_3$), which precipitates as a white solid.

Reaction:

$2NaHC{O}_3(aq)+MgC{l}_2(aq)\to Mg(HC{O}_3{)}_2(aq)+2NaCl(aq)$

$Mg(HC{O}_3{)}_2(aq)\stackrel{heat}{\to }MgC{O}_3(s)\downarrow +H_{2}O(l)+C{O}_2(g)$