Question

Mineral Acid are used in laboratory but carboxylic acid like vinegar is used as a preservative in pickles

(i) Illustrate vinegar as a weak acid and hydrochloric acid as a strong acid with the help of ionisation equation

(ii) Compare vinegar with glacial acetic acid

Answer 1

i) Vinegar is a weak acid and HCL is a strong acid and this can be explained by the formula as follows;  

$\begin{array}{l}{\mathrm{H}_{2} \mathrm{O}+\mathrm{HCl} \rightarrow \mathrm{H}_{3} \mathrm{O}^{+}+\mathrm{Cl}^{-}} \\ {\mathrm{CH}_{3} \mathrm{COOH} \rightarrow \leftarrow \mathrm{H}^{+}+\mathrm{CH}_{3} \mathrm{COO}^{-}}\end{array}$  

ii) Glacial acetic acid is known as the common name for the acetic acid without water. Vinegar, on the other hand, is a light solution of acetic acid in water.  

Explanation:

• Acids can be of different strengths and can range from being very strong to that of very weak.
• Strong acids, when coming in contact with tissue and other material, can damage them thoroughly whereas weak acids can result in a small tinge.
• The strength depends on how effectively acids can ionize water. The vinegar is a very dilute solution of acetic acid whereas the latter without any water is known as glacial acetic acid.  

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