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24 June, 14:28

When the concentration of hydrogen ions in a solution is decreased by a factor of ten, the ph of the solution

a. increases by 1

b. increases by 10

c. decreases by 1

d. decreases by 10?

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Answers (1)
  1. 24 June, 16:23
    0
    Knowing the concentration of the hydronium ion in moles per liter or molarity, the pH is calculated using the expression

    pH = - log [H3O+]

    If the concentration [H3O+] is decreased by a factor of 10, it becomes [H3O+]/10:

    pH = - log [H3O+]/10

    According to the quotient rule of the properties of logarithm, we can rewrite the above equation as

    pH = - {log [H+] - log (10) ]

    = - {log [H+] - 1}

    = - log [H+] + 1

    Therefore, the answer is a. increases by 1.
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