CH-113
pH scale
Chemistry · Secondary 3 · Medium · pH scale
A student tests an unknown solution with universal indicator and obtains pH 12. Which statement about the solution is correct?
- It is a strong acid that turns blue litmus red.
- It is a weak acid that partially dissociates.
- It is an alkaline solution that can neutralise acids.
- It is neutral and contains equal amounts of H⁺ and OH⁻.
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