Consider these acids Acid A B C D pK a 3.7 9.2 7.4 1.

Name: Problem 37, Chapter 13: Chemistry Principles and Reactions
Uploaded: 2021-06-22T07:27:57-08:00
Duration: 4 min 10 s
Channel: Sima Sarker
Description: Consider these acids Acid A B C D pK a 3.7 9.2 7.4 1.6 (a) Arrange the acids in order of decreasing acid strength from strongest to weakest. (b) Which acid has the largest Ka value?

step 1 In this question, four acids A, B, C, D are given with their PCA value. We have to arrange these

Question

Consider these acids $$ \begin{array}{ccccc} \hline \text { Acid } & \text { A } & \text { B } & \text { C } & \text { D } \\ \text { pK }_{\text {a }} & 3.7 & 9.2 & 7.4 & 1.6 \\ \hline \end{array} $$ (a) Arrange the acids in order of decreasing acid strength from strongest to weakest. (b) Which acid has the largest $K_{\mathrm{a}}$ value?

   Consider these acids
$$
\begin{array}{ccccc}
\hline \text { Acid } & \text { A } & \text { B } & \text { C } & \text { D } \\
\text { pK }_{\text {a }} & 3.7 & 9.2 & 7.4 & 1.6 \\
\hline
\end{array}
$$
(a) Arrange the acids in order of decreasing acid strength from strongest to weakest.
(b) Which acid has the largest $K_{\mathrm{a}}$ value?

Chemistry Principles and Reactions

William L.… 8th Edition

Chapter 13, Problem 37

Instant Answer

Solved by Expert Sima Sarker

06/22/2021

Step 1

Therefore, a lower pKa value indicates a higher Ka value. The higher the Ka value, the stronger the acid. Show more…

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Consider these acids $$ \begin{array}{ccccc} \hline \text { Acid } & \text { A } & \text { B } & \text { C } & \text { D } \\ \text { pK }_{\text {a }} & 3.7 & 9.2 & 7.4 & 1.6 \\ \hline \end{array} $$ (a) Arrange the acids in order of decreasing acid strength from strongest to weakest. (b) Which acid has the largest $K_{\mathrm{a}}$ value?

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Key Concepts

Acid Dissociation Constant (Ka) and pKa

The acid dissociation constant (Ka) measures the extent to which an acid dissociates in solution, quantifying its strength. The pKa is the negative logarithm of Ka, providing a convenient scale where a lower pKa value corresponds to a stronger acid because it indicates a larger Ka, meaning the acid donates protons more readily.

Comparison of Acid Strength

Acid strength is determined by how completely an acid donates its protons in solution. Using the pKa value as an indicator, acids with lower pKa values are stronger and more likely to dissociate, while those with higher pKa values are weaker. This concept allows for the ranking of acids from the strongest to the weakest based on their respective pKa values.

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