酸解离常数计算器 — 公式

## How to Calculate Ka

### Formula

**Ka = [H+][A-] / [HA]**

For the equilibrium: HA <-> H+ + A-

计算示例

At equilibrium: [H+]=0.004, [A-]=0.004, [HA]=0.096 M.

  1. Ka = (0.004 × 0.004) / 0.096
  2. Ka = 0.000016 / 0.096
  3. Ka = 1.67 × 10^-4
  4. pKa = -log10(1.67 × 10^-4) = 3.78