Answers

2015-11-02T20:54:37+08:00
(h30+)or PH=7.4
so if we assume that behind all activity of hydrogen ion in water solution is hydronium (H30+).

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2015-11-07T17:27:00+08:00
Concentration of the Hydronium Ion
    H3O+ = 10^-pH
    H3O+ = 10^-7.35
    H3O+ = 3.1 × 10^-8 mol/L

Note: Just use a scientific calculator to solve it :)

---Kein09---
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