Calculator

Model / formula

pH vs V_b — strong/strong only; equivalence when n_a = n_b

V_acid (mL)

C_acid (mol/L)

C_base (mol/L)

Max V_base (mL)

Steps

Result

Strong acid titrated with strong base (activity ≈ conc., 25 °C). V_titrant = 0.0000 → pH = 1.00 V_titrant = 2.5000 → pH = 1.09 V_titrant = 5.0000 → pH = 1.18 V_titrant = 7.5000 → pH = 1.27 V_titrant = 10.0000 → pH = 1.37 V_titrant = 12.5000 → pH = 1.48 V_titrant = 15.0000 → pH = 1.60 V_titrant = 17.5000 → pH = 1.75 V_titrant = 20.0000 → pH = 1.95 V_titrant = 22.5000 → pH = 2.28 V_titrant = 25.0000 → pH = 7.00 V_titrant = 27.5000 → pH = 11.68 V_titrant = 30.0000 → pH = 11.96 V_titrant = 32.5000 → pH = 12.12 V_titrant = 35.0000 → pH = 12.22 V_titrant = 37.5000 → pH = 12.30 V_titrant = 40.0000 → pH = 12.36 V_titrant = 42.5000 → pH = 12.41 V_titrant = 45.0000 → pH = 12.46 V_titrant = 47.5000 → pH = 12.49 V_titrant = 50.0000 → pH = 12.52

Model

Strong–strong only; activity effects ignored.

Educational use only. Double-check values for labs, homework, and exams.

Titration curve (strong–strong)

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How to use

Model