Question

Indicator $V$ could be used to find the equivalence point for $0.1M$ acetic acid and $0.1M$ ammonium hydroxide solution.

• A. True
• B. False

Answer 1

The correct option is B False

The indicator $V$ changes its colour formed to yellow in a $pH$ range from $2.8$ to $4.1$.

Now $0.1M$ ${CH}_{3}COOH$ reacts with $0.1M$ ${NH}_{4}OH$ to form ${CH}_3{COONH}_4$. The $pH$ will be around $7.0$ (because ${pK}_a\approx 4.7$ and ${pK}_b\approx 4.7$). So the indicator $V$ ($pH$ $2.8$ to $4.1$) can not be used.

Answer will be false.