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10 August, 08:15

A sample of lemon juice has a pH of 3. What is the [OH-] concentration of the lemon juice? A) 11 B) 1 X 10+3 C) 1 X 10-3 D) 1 X 10-11

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  1. 10 August, 08:20
    0
    pH scale is used to determine the acidity of a solution

    pH is calculated using the H⁺ concentration

    pOH scale is used to determine how basic a solution is

    pOH is calculated using the OH⁻ concentration

    pH and pOH are related in the following formula

    pH + pOH = 14

    pH = 3

    pOH = 14 - 3

    pOH = 11

    pOH is calculated using the following formula

    pOH = - log[OH⁻]

    [OH⁻] = antilog (-pOH)

    [OH⁻] = antilog (-11)

    [OH⁻] = 1 x 10⁻¹¹ M

    the [OH⁻] concentration of lemon juince is D) 1 x 10⁻¹¹ M
  2. 10 August, 08:38
    0
    PH+pOH=14

    pOH=14-pH=14-3=11

    pOH=-log[OH⁻]

    11=-log[OH⁻]

    [OH⁻] = 10⁻¹¹ = 1*10⁻¹¹

    Answer is D.
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