The pH of 0.10 M HA is 3.0.
What is Ka of HA?
- A
1.0×10⁻¹
- Bcheck_circle
1.0×10⁻⁵
- C
1.0×10⁻³
- D
1.0×10⁻⁷
Explanation
[H⁺] = 10⁻³ M = x. Ka ≈ x²/[HA]₀ = (10⁻³)²/0.10 = 10⁻⁶/10⁻¹ = 10⁻⁵.
Weak Acid and Base Equilibria
AP Chemistry· difficulty 2/5
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