CH-1106

pH scale

Chemistry · Secondary 4 · Medium · pH scale

1. It is alkaline and contains a higher concentration of $OH^-$ ions than pure water.
2. It is strongly acidic and turns blue litmus paper red.
3. It is neutral and has equal concentrations of $H^+$ and $OH^-$ ions.
4. It is slightly acidic and has fewer $H^+$ ions than a pH 7 solution.

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