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4 April, 02:47

A solution has a pH of 2.5. Answer the following questions.

pOH =

[H+] =

[OH-] =

+2
Answers (1)
  1. 4 April, 05:41
    0
    PH + pOH = 14 ⇒ pOH = 14 - pH

    pOH = 14 - 2.5

    pOH = 11.5

    [H⁺] = 10^ (-pH) = 10^ (-2.5)

    [H⁺] = 0.003 M

    [OH⁻] = 10^ (-pOH) = 10^ (-11.5) = 3 * 10⁻¹² M

    [OH⁻] = 3 * 10⁻¹² M

    pH = 2.5 implies one significant digit
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