Question

Complete and balance the following equation:

${\mathrm{CaC}}_2+2{\mathrm{H}}_2\mathrm{O}\to \dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}\dot{}+\mathrm{Ca}{\left(\mathrm{OH}\right)}_2$

Answer 1

1. The given reaction is depicting the laboratory preparation of unsaturated hydrocarbon ethyne ${\mathrm{C}}_2{\mathrm{H}}_2$ (acetylene) and was first discovered by Friedrich Wohler.

2. In this reaction calcium carbide $\left({\mathrm{CaC}}_2\right)$ is made to react with water $\left({\mathrm{H}}_2\mathrm{O}\right)$ to form acetylene gas.

3. Lime milk $\left(\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\right)$ is also generated in this reaction.

The balanced reaction is as follows:

${\mathrm{CaC}}_2\left(\mathrm{s}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{aq}\right)\to {\mathrm{C}}_2{\mathrm{H}}_2\left(\mathrm{g}\right)+\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\left(\mathrm{l}\right)$