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9 August, 04:20

When the pH of a solution changes from a pH of 5 to a pH of 3, the hydronium ion concentration is

A. 0.01 of the original content

B. 0.1 of the original content

C. 10 times the original content

D. 100 times the original content

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Answers (1)
  1. 9 August, 04:55
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    PH = - log ([H3O+])

    so the pH is in powers of 10

    1 * 10^ 5 / 1*10^3 = 1 * 10^2 = 100

    so the answer is:

    D. 100 times the original content
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