Question

A certain indicator (an organic dye) has ${pK}_{a} = 5 .$ For which of the following titrations may it be suitable.

Moderate

Solution

(3) $P^{H} range of an indicator is - 1 to + 1 of P^{K_{In}}$ ; so it is suitable for $P^{H} < 7$
${pK}_{HIn} = 5 (a) {CH}_{3} COOH + NaOH, end point pH > 7$
(b) Aniline hydrochloride + NaOH, end point pH > 7
$(c) {NaHCO}_{3}$ + HCI, end point pH < 7
$(d) Ba {(OH)}_{2} + H_{2} C_{2} O_{4},$ end point pH > 7

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

SCAN ME