Question

Translate the following statement into a word equation and then write a balanced chemical equation for the same.

(i) Phosphorus burns in the presence of chlorine to form phosphorus pentachloride.

(ii) Magnesium reacts with hydrochloric acid to give magnesium chloride and hydrogen.

Answer 1

(i) Phosphorus + Chlorine → Phosphorus pentachloride

$P_4\left(s\right)+10{\mathrm{Cl}}_2\left(g\right)\to 4{\mathrm{PCl}}_5$ (S)

(i) Magnesium + Hydrochloric acid → Magnesium chloride + Hydrogen

$\mathrm{Mg}\left(s\right)+2\mathrm{HCl}\left(\mathrm{aq}\right)\to {\mathrm{MgCl}}_2\left(\mathrm{aq}\right)+H_2\left(g\right)$