A solution reacts with marble chips to produce a gas which turns lime water milky.  The

solution contains

Marble $\left({\text{CaCO}}_3\right)$ : Any carbonate react with acid to form that can change

the lime water to milky white.

Reaction 1 : ${\text{CaCO}}_{\text{3}}+{\text{H}}_{\text{2}}{\text{SO}}_{\text{4}}\to {\text{CaSO}}_4+{\text{CO}}_{\text{2}}+{\text{H}}_{\text{2}}\text{O}$

Reaction 2 : $\text{Ca}{\left(\text{OH}\right)}_{\text{2}}+{\text{CO}}_{\text{2}}\to \underset{\text{Whit\hspace{0.17em}ppt}}{{\text{CaCO}}_{\text{3}}}+{\text{H}}_{\text{2}}\text{O}$