During a Field Trip to Study the Problem of Acid

question 7

Multiple Choice

During a field trip to study the problem of acid rain,you test one lake that had observed a major fish kill.It was found to have a pH of 5.37.What is the [H⁺]?

• A) 2.3*^-9
• B) 3.7*10^-5
• C) 4.3*10^-6
• D) 1.7*10⁵

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Definitions:

Signal Detection

A theory that aims to quantify the ability to discern between information-bearing patterns and random patterns that distract from the information.

Absolute Threshold

The absolute threshold refers to the minimum intensity of a stimulus that one can detect 50% of the time.

Difference Threshold

The minimum difference in stimulation needed to detect a change or difference between two stimuli.

Just-noticeable Difference

The smallest change in intensity of a stimulus that can be detected.