Salt of weak acid (basic hydrolysis) (Kh = Kw/Ka; for dilute salt [OH-] ≈ √(Kh C))
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Kh = Kw/Ka; for dilute salt [OH-] ≈ √(Kh C)
What each symbol means
| Symbol | What it stands for |
|---|---|
| C | Concentration of salt (e.g. NaA) |
| K_a | Of conjugate acid HA |
| K_h | Hydrolysis constant of A- |
When to use this
Salt of strong base + weak acid; dilute; Kh small ⇒ use √(KhC) if hydrolysis weak.