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6 September, 11:24

how many H + ions are in a solution with a pH of 2 and how many H + ions are in a solution with a pH of 6?

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  1. 6 September, 12:39
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    i) pH = 2

    pH = - log (H+)

    : - (H+) = 10^ (-2)

    : - (H+) = 0.01 M

    ii) pH = 6

    pH = - log (H+)

    : - (H+) = 10^ (-6)

    : - (H+) = 0.000001 M

    Explanation:

    By definition: pH = - log (H+).

    Given your pH, solve for the H + using the the following log rule:

    if a = (+/-) log (b) then

    b = 10^ ((+/-) a).

    Also remember unit of concentration is molar (M)
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