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18 November, 07:49

What is the concentration of hydrogen ions [H+] in a solution of pH = 4.0?

1 * 104M

4 * 10-4M

2 * 10-2M

1 * 10-4M

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Answers (1)
  1. 18 November, 09:40
    0
    All we need to do is used the following formula:

    [H+] = 10^-pH

    so

    [H+] = 10^-4.0 = 1 x 10^-4 M

    the answer is the last choice
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