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What is the concentration of H+ ions in moles/L in water if the pOH value is 6?

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+1 vote
in Environmental Engineering by (81.4k points)
What is the concentration of H+ ions in moles/L in water if the pOH value is 6?

(a) 10^-6

(b) 10^-7

(c) 10^-8

(d) 10^-9

This question was addressed to me during a job interview.

My question is based upon Chemical Characteristic of Water in section Quality of Water of Environmental Engineering

1 Answer

+2 votes
by (693k points)
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Best answer
The correct choice is (c) 10^-8

To explain I would say: pH + pOH = 14

pOH = 6, so pH = 14-6 = 8

H^+ = 10^-pH = 10^-8moles/L.

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