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Weak Acid / Base Calculator
Equilibrium [H₃O⁺]/[OH⁻], percent ionization and pH for weak electrolytes — approximation checked against the quadratic every time.
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Results update as you type. Every step of the working is shown below.
Examples:
Result
Enter values above — the answer appears here instantly, with full working.
Formula used
Ka = x²/(C−x) → x ≈ √(Ka·C) when C/Ka ≥ 100
Every result substitutes your values into this relation step by step above.
Assumptions
- One proton transfer; no other equilibria contribute.
- The √(Ka·C) shortcut is used ONLY when C/Ka ≥ 100 and x < 5 % of C — otherwise the exact quadratic result is reported.