Question

What are pH indicators?

• A. Aqueous solution of either salts of strong acids or strong bases.
• B. Aqueous solution either salts of weak acids or weak bases.
• C. Aqueous solution of either weak acids or weak bases.
• D. Aqueous solution of either strong acids or strong bases.

Answer 1

The correct option is C

Aqueous solution of either weak acids or weak bases.

pH indicators are aqueous solutions of either weak acids or weak bases. They are chemical detectors of hydrogen ions ($H^{+}$) and hydroxide ions ($O{H}^{-}$) . It is added in small quantity to a solution to determine the pH.