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23-01-2020
Chemistry

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Measurements show that the ph of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?

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23-01-2020

Answer:

[OH⁻] → 1×10⁻¹⁰

Explanation:

pH = - log [H⁺]

pOH = - log [OH⁻]

pH + pOH = 14

4 + pOH = 14

14 - 4 = 10 → pOH

10^-pOH = [OH⁻]

10⁻¹⁰ = [OH⁻] → 1×10⁻¹⁰

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