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Question 1 of 8
1. Question
If the pH of a solution increases by 3 units, the H3O+ concentration changes by:
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Question 2 of 8
2. Question
What is the pH of a solution that is made up of 0.20 M NH3 and 0.30 M NH4Cl? The Kb of NH3 is 1.8 × 10−5.
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Question 3 of 8
3. Question
Which of the following pairs would not create a buffer when mixed in equal portions?
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Question 4 of 8
4. Question
A buffer is created by mixing 25 mL of 0.10 M acid with 25 mL of 0.010 M conjugate base. If the pKa of the acid is 4.25, what is the pH of the buffer?
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Question 5 of 8
5. Question
What ratio of [base] to [acid] would yield a buffer with a pH of 4.35 if the pKa of the acid is 2.35?
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Question 6 of 8
6. Question
Which of the following weak acids would be best to prepare a buffer with a pH of 4.2?
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Question 7 of 8
7. Question
What is the concentration of conjugate base in a buffer at a pH of 3.86 and a weak acid concentration is 0.25 M? The pKa of the acid is 3.77.
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Question 8 of 8
8. Question
Which of the following buffers would have the lowest pH?
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