Practice Relationship Between Ka , Kb , And Kw For Conjugate Pairs (7.2.5)

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6 sample questions

Question 1.
Define Ka and explain its significance.
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Think about what it means for an acid to dissociate in solution.
Question 2.
What does Kw represent, and how is it related to pH?
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Consider how these ions behave in pure water.
3Question 3.
What relationship exists between Ka and Kb for a conjugate pair?
- Ka × Kb = Ksp
- Ka × Kb = Kw
- Ka + Kb = Kw
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Think of how water ionizes and relate it to these constants.
4Question 4.
True or False: A strong acid has a strong conjugate base.
- True
- False
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Recall what happens to the conjugate pair dynamics.
Question 5.
A solution contains 0.050 M of a weak acid with a Ka of 1.0 x 10^-5. Calculate the pH of the solution.
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Assume x is much smaller than 0.050 for simplifications.
Question 6.
Given that pKa = 4.75, what is the relationship of Kb with respect to Kw at this pKa?
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Use the connected relationships of Ka, Kb, and Kw.

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