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

question 22

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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Definitions:

Community Psychology

Area of psychology in which psychologists serve at various levels including individual, group, and community, focusing on promoting social welfare and preventing social problems.

Psychological Problems

Issues or disorders that affect an individual's mental health and well-being.

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Community developments with pre-set layouts and amenities, designed to meet specific living or commercial needs.

Local Environment

The immediate physical surroundings, conditions, and influences affecting the ecosystems or community at a particular location.