Weak acid / weak base calculator
pH from K_a and C (acid) or pOH/pH from K_b and C (base).
Calculator
How to use
Weak acid and base
Uses $\sqrt{K_a C}$ and $\sqrt{K_b C}$ style estimates—check validity vs. K_a and C.
Educational use only. Double-check values for labs, homework, and exams.