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17 February, 15:14

Calculate the hydronium ion concentration in an aqueous solution with a ph of 9.85 at 25°c.

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Answers (2)
  1. 17 February, 15:25
    0
    The hydronium ion concentration for a solution with pH 9.85 = 1.41 * 10^-10M

    Explanation:

    Step 1: data given

    pH = 9.85

    Temperature = 25.0 °C

    the hydronium ion concentration = [H3O+] = [H+]

    Step 2: Calculate the hydronium ion concentration

    [H3O+] = [H+]

    pH = - log[H+]

    9.85 = - log[H+]

    [H+] = 10^-9.85

    [H+] = 1.41 * 10^-10M = [H3O+]

    The hydronium ion concentration for a solution with pH 9.85 = 1.41 * 10^-10M
  2. 17 February, 15:37
    0
    1.41 * 10⁻¹⁰ M

    Explanation:

    We have a solution with a pH of 9.85 at 25 °C. We can calculate the concentration of H⁺ using the following expression.

    pH = - log [H⁺]

    [H⁺] = antilog - pH

    [H⁺] = antilog - 9.85

    [H⁺] = 1.41 * 10⁻¹⁰ M

    H⁺ is usually associated with water molecules forming hydronium ions.

    H⁺ + H₂O → H₃O⁺

    Then, the concentration of H₃O⁺ ions is 1.41 * 10⁻¹⁰ M.
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