( begin aligned & CH_3-C equiv CH+ frac 2 % Hg^ 2+ 20 % H_2 SO_4 ~T rightarrow readjustment. & H_2 O & (HCOO)_2 Ca Delta rightarrow X & Y+CaCO_3 end aligned )

\begin{aligned} & \mathrm{CH}_3-\mathrm{C} \equiv \mathrm{CH}+\frac{2 \% \mathrm{Hg}^{2+}}{20 \% \mathrm{H}_2 \mathrm{SO}_4 \mathrm{~T}} \rightarrow \text { readjustment. } \\ & \mathrm{H}_2 \mathrm{O} \\ & (\mathrm{HCOO})_2 \mathrm{Ca} \Delta \rightarrow \mathrm{X} \\ & \mathrm{Y}+\mathrm{CaCO}_3\end{aligned}

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