In Order to Make Up a Buffer Solution with a Neutral

question 3

Multiple Choice

In order to make up a buffer solution with a neutral pH, it would be best to make use of

• A) a weak acid with a K_a at or near 1.00 × 10⁷ and its conjugate base
• B) a weak acid with a pK_a near 7.00 or a K_a near 1.00 × 10^-7 and its conjugate base
• C) an equimolar mixture of a strong acid and a strong base
• D) an equimolar mixture of an extremely weak acid and an extremely strong base
• E) an equimolar mixture of NaCl and HCl

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Definitions:

Variance

A measure of how much values in a data set differ from the mean of the set.

Cohen's D

Cohen's d is a statistic used to quantify the difference between two means, measured in standard deviations.

Cohen's D

A measure of effect size indicating the standardized difference between two means.

Standard Deviation Units

Units measured in terms of the number of standard deviations away from the mean of the distribution.