Question

Volhard's method of chloride ion determination:

• A. \( \text{is back titration with ammonium thiocyanate} \)
• B. \( \text{is direct titration with ammonium thiocyanate} \)
• C. \( \text{uses dichlorofluorescein as an indicator} \)
• D. \( \text{uses potassium chromate} \)

Hint:

Back titration is useful for determining ions that form insoluble precipitates.

Answer 1

The Correct Option is A

The Volhard method is a back titration technique used for determining chloride ion concentration. Excess silver nitrate reacts with chloride, and the remaining silver ions are titrated with ammonium thiocyanate using ferric ions as an indicator. This method ensures accurate chloride analysis, even in complex matrices.