The Chemical Acidity of a Solution Is Measured in Units $\mathrm { pH } = - \log \left[ \mathrm { H } ^ { + } \right]$

question 198

Multiple Choice

The chemical acidity of a solution is measured in units of pH: $\mathrm { pH } = - \log \left[ \mathrm { H } ^ { + } \right]$ , where $\left[ \mathrm { H } ^ { + } \right]$ is the hydrogen ion concentration in the solution.If a sample of rain has a pH of 3.4, how many times higher is its $\left[ \mathrm { H } ^ { + } \right]$ than pure water's, which has a pH of 7?

• A) \(4.0 \times 10 ^ { 3 }\)
• B) \(2.5 \times 10 ^ { 4 }\)
• C)7
• D) \(2.5 \times 10 ^ { 3 }\)
• E) \(4.0 \times 10 ^ { 4 }\)

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