Question

Write any two tests to show that ${\mathrm{CH}}_3\mathrm{COOH}$ is acidic in nature.

Answer 1

• Acids when reacted with blue litmus paper, it turns red. Similarly, acetic acid also turns blue litmus red.
• Acids react with base to form salt and water. This is called neutralization reaction.
• This reaction can be used to identify the acidic nature.
• Acetic acid (${\mathrm{CH}}_3\mathrm{COOH}$) reacts with sodium hydroxide ($\mathrm{NaOH}$) to form sodium acetate (${\mathrm{CH}}_3\mathrm{COONa}$) and water(${\mathrm{H}}_2\mathrm{O}$).

$\underset{\mathrm{Acetic}\mathrm{acid}}{{\mathrm{CH}}_3\mathrm{COOH}\left(\mathrm{aq}\right)}+\underset{\mathrm{Sodium}\mathrm{hydroxide}}{\mathrm{NaOH}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Sodium}\mathrm{acetate}}{{\mathrm{CH}}_3\mathrm{COONa}\left(\mathrm{aq}\right)}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$

So, from the above two tests, we can say that ${\mathrm{CH}}_3\mathrm{COOH}$ is an acid.