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pH of a solution from its hydrogen ion concentration

The same question, asked 3 times: 9 May 2024 S2*, 13 May 2024 S2*, 19 Apr 2026 S1. Every wording below, oldest first.

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  1. Question 1

    9 May 2024 S2

    91
    What is the pH of a solution containing 2.2×10−62.2 \times 10^{-6} M hydrogen ions?

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  2. Question 2

    13 May 2024 S2

    52
    What is the pH of solution containing 4.62×10−4 M H+4.62\times10^{-4}\ \text{M H}^+ ions?

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  3. Question 3

    19 Apr 2026 S1

    12
    What is the pH of solution containing 5×10−4 M H+5 \times 10^{-4}\ \mathrm{M\,H^+} ion?

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