Weak Acid pH Calculator (Ka — ICE Table) Calculator
Calculates pH of a weak acid using Ka and ICE table.
Info
This calculator is a professional tool that performs step-by-step pH calculations for weak acid solutions. The calculation uses the ICE table and acid dissociation equilibrium: HA ⇌ H⁺ + A⁻ Equilibrium equation: Ka = ([H⁺][A⁻]) / [HA] The tool first sets up the quadratic equation from Ka and concentration values, then solves mathematically for [H⁺] and calculates pH: pH = -log[H⁺] It also checks whether the 5% approximation (weak acid assumption) is valid and states which method was used. This tool is especially useful for: • High school / AP Chemistry • University general chemistry • Laboratory calculations • Preliminary analysis of buffer solutions Note: Calculations are idealized for dilute aqueous solutions at 25°C.
- Weak acids partially dissociate in water.
- pH is calculated from Ka and the initial concentration.
- The equilibrium equation forms a quadratic equation.
- The 5% rule is automatically checked.
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