AP EAMCET · Chemistry · Ionic Equilibrium
The \(\mathrm{p} K_a\) of a weak acid, benzoic acid and \(\mathrm{p} K_b\) of a weak base, ammonium hydroxide are 4.25 and 4.75 respectively. Then the \(\mathrm{pH}\) of \(0.1 \mathrm{M}\) solution of ammonium benzoate will be
- A 7.1
- B 7.5
- C 6.75
- D 6.5
Answer & Solution
Correct Answer
(C) 6.75
Step-by-step Solution
Detailed explanation
Ammonium benzoate \(\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{COONH}_4\right)\) is the salt weak benzoic acid \(\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{COOH}, \mathrm{p} K_a=4.25\right)\) and weak ammonium hydroxide \(\left(\mathrm{NH}_4 \mathrm{OH}, \mathrm{p} K_b=4.75\right)\).…
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