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22 December, 00:55

9-19. Calculate the pH of water at 25°C and 75°C. The values for pKw at these temperatures are 13.99 and 12.70, respectively.

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  1. 22 December, 02:06
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    7.00; 6.35

    Explanation:

    1. At 25 °C

    2H₂O ⇌ H₃O⁺ + OH⁻

    pH = ½pKw = ½ * 13.99 = 7.00

    2. At 75° C

    pH = ½pKw = ½ * 12.70 = 6.35
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