Hydroxide Ion Calculator Formula

Understand the math behind the hydroxide ion calculator. Each variable explained with a worked example.

Use the Hydroxide Ion Calculator

Formulas Used

[OH-] Concentration

oh_conc = pow(10, -poh_val)

pH

ph_from_poh = 14 - poh_val

Variables

VariableDescriptionDefault
poh_valpOH2

How It Works

How to Calculate [OH-] from pOH

Formula

[OH-] = 10^(-pOH)

Worked Example

Find [OH-] for pOH = 2.

poh_val = 2
  1. 01[OH-] = 10^(-2)
  2. 02[OH-] = 0.01 M
  3. 03pH = 14 - 2 = 12

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