Complete the following table, which lists information about the measured acid dissociation constants of three unknown weak acids. Note: be sure each number you put in the table has the correct number of significant digits.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Complete the following table, which lists information about the measured acid dissociation constants of three unknown weak acids.
Note: be sure each number you put in the table has the correct number of significant digits.
acid
A
B
C
Explanation
Ka
1. X 10
0
0
-4
Check
pK
0
0.81
1.878
relative strength
(Choose one) ✓
(Choose one)
(Choose one)
ост
28
x10
X
3
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Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use
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Transcribed Image Text:Complete the following table, which lists information about the measured acid dissociation constants of three unknown weak acids. Note: be sure each number you put in the table has the correct number of significant digits. acid A B C Explanation Ka 1. X 10 0 0 -4 Check pK 0 0.81 1.878 relative strength (Choose one) ✓ (Choose one) (Choose one) ост 28 x10 X 3 © Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use tv Sl MacBook Air
Expert Solution
Step 1

 According to Arrhenius concept, an acid is a substance i.e. when dissolved in water gives H+ ions . Thus Greater the number of H+ ions produced in the aqueous solution, the stronger is the acid.

 Greater is the dissociation constant of the weak acid (Ka), greater is the amount of H+ (aq) produced, therefore stronger is the acid. Thus, Ka values give a measure of the relative strengths of the weak acids.

 & Also pKa = - log ( Ka )  

=> Higher the Ka value of acid , lower will be the value of pKa of acid

When comparing two compounds, the more acidic compound will have a higher Ka and a lower pKa.

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