GKFix MCQ Question

What is the value of Ka for a monobasic acid with pH 4.50 and a concentration of 0.1 M?

• A. 1.0 × 10^–6
• B. 3.16 × 10^–5
• C. 1.0 × 10^–8
• D. 1.77 × 10^–5