The following is an alpha plot for a monoprotic weak acid, HA. 1.0 a 0.5 4 6 pH 8 10 12 14 HA A™ (1) Estimate the pH at which is there a 50:50 mixture of acid and conjugate base? (2) At pH = 10.0, most of the substance is in the form of ◊ a. HA b. A (3) What is the approximate fractional abundance of the acid at pH = 6.0?

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The following is an alpha plot for a monoprotic weak acid, HA. 

[Graph Description: The plot shows the fractional abundance against pH for a weak acid (HA) and its conjugate base (A-). The x-axis represents pH ranging from 0 to 14, while the y-axis represents the fractional abundance (α), ranging from 0 to 1. The blue curve represents HA, and the red curve represents A-. At lower pH values, HA is predominant. As pH increases, the abundance of HA decreases, while the abundance of A- increases. The curves intersect around pH 6, indicating a 50:50 mixture.]

1. Estimate the pH at which there is a 50:50 mixture of acid and conjugate base?

2. At pH = 10.0, most of the substance is in the form of: 
   a. HA
   b. A⁻

3. What is the approximate fractional abundance of the acid at pH = 6.0?

4. Estimate the value of Kₐ for the acid.
Transcribed Image Text:The following is an alpha plot for a monoprotic weak acid, HA. [Graph Description: The plot shows the fractional abundance against pH for a weak acid (HA) and its conjugate base (A-). The x-axis represents pH ranging from 0 to 14, while the y-axis represents the fractional abundance (α), ranging from 0 to 1. The blue curve represents HA, and the red curve represents A-. At lower pH values, HA is predominant. As pH increases, the abundance of HA decreases, while the abundance of A- increases. The curves intersect around pH 6, indicating a 50:50 mixture.] 1. Estimate the pH at which there is a 50:50 mixture of acid and conjugate base? 2. At pH = 10.0, most of the substance is in the form of: a. HA b. A⁻ 3. What is the approximate fractional abundance of the acid at pH = 6.0? 4. Estimate the value of Kₐ for the acid.
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