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The equation for the pH of a substance is pH = –log[H ], where H is the concentration of hydrogen ions. What is the approximate pH of a solution if the concentration of hydrogen ions is 5. 0 × 10–4 moles per liter? 2. 7 3. 0 3. 3 3. 6.

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10n31y

The formula is pH = -log[[tex]H^{+}[/tex]]. You are given the concentration of hydrogen ions so all you need to do is input that into the formula.

[tex]pH=-log[H^{+}]\\\\pH=-log[5.0x10^{-4}]\\\\pH=3.30[/tex]

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