For Which of the Following 0 $\times$ 10^-2,K_a2 = 1 $\times$ 10^-7
B)H₂B;K_a1 = 2

question 130

Multiple Choice

For which of the following 0.10 M diprotic acids would the second dissociation affect the pH significantly?

• A)H₂A;K_a1 = 4.2 \(\times\) 10^-2,K_a2 = 1.8 \(\times\) 10^-7
• B)H₂B;K_a1 = 2.4 \(\times\)10^-4,K_a2 = 6.1 \(\times\) 10^-8
• C)H₂C;K_a1 = 1.3 \(\times\) 10^-4,K_a2 = 5.2 \(\times\) 10^-9
• D)H₂D;K_a1 = 1.8 \(\times\) 10^-3,K_a2 = 9.3\(\times\) 10^-4
• E)The second dissociation never affects the pH significantly.

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Definitions:

Smallest Data Values

The minimum value within a set of numbers, indicating the lowest point in a data set.

Coefficient of Variation

A statistical measure of the dispersion of data points in a data series around the mean, expressed as a percentage of the mean.

Median

The middle value in a set of data, arranged in ascending or descending order, or the average of the two middle values if there is an even number of observations.

Even Number

An integer that is divisible by 2 without leaving a remainder.