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

question 129

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.What is $\left[ \mathrm { H } ^ { + } \right]$ if the $\mathrm { pH } = 6.8$ ?

• A) \(1.58 \times 10 ^ { - 7 }\)
• B) \(6.31 \times 10 ^ { - 7 }\)
• C) \(6.31 \times 10 ^ { - 6 }\)
• D) \(1.58 \times 10 ^ { - 6 }\)
• E)6.800

---

Definitions:

Five Elements

In various philosophies, a model of analyzing the world through five basic constituents such as earth, water, fire, air, and ether.

Chi

A concept originating from Chinese philosophy that signifies the vital life force or energy that flows through living beings.

Familiarity

The quality of being well known or easily recognized, often resulting from being encountered frequently or studied extensively.

Perceptual Selection

The process by which individuals filter and select environmental stimuli to pay attention to, based on various factors such as interests, background, and expectations.