Chemistry › Section N · Acid-base equilibria › Topic N.2
pH and pOH
Hydronium concentrations in everyday solutions range from about 1 M to below 10⁻¹³ M, far too wide for ordinary numbers to compare easily. The pH scale squeezes that range into a short line of simple values, and pOH does the same for hydroxide.
In this topic
- Concentrations across many powers of ten
- The p-function and pH
- Reading a logarithmic scale
- pOH and the link to pH
- Acidic, neutral and basic
- Significant figures in pH
- Worked example: pH of a strong acid
- Worked example: pOH and pH of a strong base
- Worked example: from pH back to concentrations
- Measuring pH, and some everyday values
- Common mistakes to avoid
- Key takeaways
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