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OpenStudy (anonymous):
What is the concentration of hydronium ions in a solution with a pH = 3.9? 4.14 × 10-2 7.80 × 10-3 1.26 × 10-4 3.00 × 10-5 @nechirwan
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OpenStudy (nechirwan):
\[[H3O+]=10^{-pH}\] = \[10^{-3,9}\] = 1.26 × 10-4
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