Question

Write equations for the reactions of aqueous hydrochloric acid on:

(A) Magnesium foil

(B) Zinc carbonate

(C) Silver nitrate solution

Answer 1

(A) Magnesium dichloride $\left({\mathrm{MgCl}}_2\right)$ salt and Hydrogen gas $\left({\mathrm{H}}_2\right)$ are formed when Hydrochloric acid reacts on magnesium foil.

$$\begin{gathered} \mathrm{Mg}+2\mathrm{HCl}\to {\mathrm{MgCl}}_2+{\mathrm{H}}_2\uparrow \\ (Hydrogenchloride)(Magnesiumchloride) \end{gathered}$$

(B) Zinc chloride $\left({\mathrm{ZnCl}}_2\right)$, water, and Carbon dioxide $\left({\mathrm{CO}}_2\right)$ gas are formed when Aqueous hydrochloric acid interacts with Zinc carbonate $\left({\mathrm{ZnCO}}_3\right)$.

$$\begin{gathered} {\mathrm{ZnCO}}_3+2\mathrm{HCl}\to {\mathrm{ZnCl}}_2+H_{2}O+{\mathrm{CO}}_2 \\ (Zincmonocarbonate)(Hydrogenchloride)(Zincchloride) \end{gathered}$$

(C) In this process, Aqueous hydrochloric acid $(HCl)$ reacts with Silver nitrate $\left(AgN{O}_3\right)$ and produce a white Silver chloride precipitate.

$$\begin{gathered} {\mathrm{AgNO}}_3\left(\mathrm{aq}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\to \mathrm{AgCl}\left(\mathrm{s}\right)+{\mathrm{HNO}}_3\left(\mathrm{aq}\right) \\ (Silvernitrate)(Silverchloride) \end{gathered}$$