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4 worked examples of pH calculations for Grade 11. Example 1: 'Find pH of 0.001 M HCl.' Work: 'HCl is a STRONG acid → fully ionizes → [H⁺] = 0.001 M = 10⁻³ M. pH = -log(10⁻³) = 3.' Example 2: 'Find pH of 0.05 M NaOH.' Work: 'NaOH is a STRONG base → [OH⁻] = 0.05 M. pOH = -log(0.05) = 1.30. pH = 14 -

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