Vinegar, used as a food preservative and additive, contains 5% v/v acetic acid. Glacial acetic acid is a liquid, i.e., 100% acetic acid. If you want to make vinegar from glacial acetic acid, how would you proceed? [Pg. No. 76]

Since vinegar contains 5% v/v acetic acid, it means 5 mL of acetic acid is present in 100 mL of vinegar solution.

Glacial acetic acid is considered 100% acetic acid, so to prepare 100 mL of vinegar, take 5 mL of glacial acetic acid and add water to make the final volume 100 mL.

$$\% \text{ v/v} = \frac{\text{Volume of acetic acid}}{\text{Volume of solution}} \times 100$$

$$5 = \frac{\text{Volume of acetic acid}}{100} \times 100$$

Volume of acetic acid = 5 mL

Therefore, 5 mL of glacial acetic acid should be diluted with water to make 100 mL of vinegar.