Chapter 4, Problem 23A

Interpretation Introduction

Interpretation:

The definition of acid is to be given.

Concept introduction:

Acid is a class of compounds.

Answer to Problem 23A

Acid is a substance which release $H^{+}$ in aqueous solution. For example: $HCl$

Explanation of Solution

In simple form, a substance which is sour in taste and turns blue litmus red is called acid.

Further acids are classified by various scientists.

According to Arrhenius, acid donates $H^{+}$ in aqueous solution as:

  $HCl\to H^{+}+C{l}^{-}$

Conclusion

Thus, a substance which furnish hydrogen ions is called acid.