What is the pH of a buffer solution which is 0.250 M in benzoic acid, , and 0.150 M in sodium benzoate, , if a K for benzoic acid is 6.5 × 10–5 ?

Name: JEE Advanced Chemistry
Price: 7999 INR
Availability: InStock

Question

What is the pH of a buffer solution which is 0.250 M in benzoic acid, $C_6H_5COOH$, and 0.150 M in sodium benzoate, $C_6H_5COONa$, if a K for benzoic acid is 6.5 × 10–5 ?

Prashant Kotian · Accepted Answer

Correct answer: B. 6 5 6 5 C H COOH + C H COONa forms acidic Buffer. Thus, 6 5 a 6 5 C H COO pH = pK log C H COOH 5 0.15 pH = -log 6.5 10 log 0.25 x 4.188 0.22 = 3.97

💡 Solution & Explanation

Practice 22,000+ questions like this