Question

Identify the gas evolved and give chemical test when dilute hydrochloric acid reacts with iron $\left(II\right)$sulfide?

Answer 1

1. In these reaction hydrogen sulfide gas is evolved with colourless gas with smell of rotten eggs.
2. Chemical test - it turns lead acetate paper into black colour.
3. $$\begin{gathered} \mathrm{FeS}+\mathrm{HCl}\to {\mathrm{FeCl}}_2+{\mathrm{H}}_2\mathrm{S} \\ (\mathrm{iron}\mathrm{II}(\mathrm{Diil}.\mathrm{hydrochloric}(\mathrm{ferrous}(\mathrm{hydrogen} \\ \mathrm{sulfide})\mathrm{acid})\mathrm{chloride})\mathrm{sulfide}) \end{gathered}$$