You Encounter a Solution That Is Basic and You Decide

question 5

Multiple Choice

You encounter a solution that is basic and you decide to test it by adding a small amount of a strong acid. The pH lowers by approximately 2 pH units, but still remains basic. What can you say about the solution?

• A) It is a buffer solution.
• B) It is not a buffer solution.
• C) It is a strong base solution.
• D) The solution has been neutralized.
• E) The solution has excess acid present.

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Definitions:

Z-test

A method of statistical analysis that evaluates whether there is a significant difference between the means of two populations, given known variances and a large sample size.

µ = 109

Represents the mean (µ) of a dataset or distribution, here specifically stated as 109.

Z-statistic

A specific kind of norm score that shows the number of standard deviations by which an individual item deviates from the distribution's average.

Critical Value

The threshold in a statistical test that defines the boundary for rejecting the null hypothesis.