Question

Analyse the reaction given below and identify its product from the options given.

${\mathrm{CaCO}}_3\left(s\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\to ?$

• A.
  $H_{2}O;{\mathrm{CaCl}}_2\mathrm{and}\mathrm{CO}$
• B. ${\mathrm{CaCl}}_2;H_2\mathrm{and}{\mathrm{CO}}_2$
• C. $H_{3}O;{\mathrm{CaCl}}_2\mathrm{and}\mathrm{CO}$
• D. ${\mathrm{CaCl}}_2;{\mathrm{CO}}_2\mathrm{and}{H}_{2}O$

Answer 1

The correct option is D

${\mathrm{CaCl}}_2;{\mathrm{CO}}_2\mathrm{and}{H}_{2}O$

• Acids liberate carbon dioxide when it reacts with metallic carbonates and bicarbonates.

• CaCO₃, which is a carbonate reacts with HCl to liberate carbon dioxide, water and salt.

• The reaction goes as follows:

${\mathrm{CaCO}}_3\left(s\right)+2\mathrm{HCl}\left(\mathrm{aq}\right)\to {\mathrm{CaCl}}_2\left(\mathrm{aq}\right)+H_{2}O\left(l\right)+{\mathrm{CO}}_2\left(g\right)$