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Author Question: What is the [CH3CO2-]/[CH3CO2H] ratio necessary to make a buffer solution with a pH of 4.44? Ka = ... (Read 114 times)

fbq8i

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Question 1

A buffer solution is prepared by dissolving 27.22 g of KH2PO4 and 3.37 g of KOH in enough water to make 0.100 L of solution. What is the pH of the H2PO4-/HPO42- buffer if the Ka2 = 6.2 × 10-8?
◦ 7.00
◦ 7.84
◦ 6.84
◦ 7.21

Question 2

What is the [CH3CO2-]/[CH3CO2H] ratio necessary to make a buffer solution with a pH of 4.44? Ka = 1.8 × 10-5 for CH3CO2H.
◦ 2.0:1
◦ 1.1:1
◦ 0.50:1
◦ 0.94:1


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Marked as best answer by fbq8i on Feb 15, 2020

zenzy

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fbq8i

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Reply 2 on: Feb 15, 2020
Wow, this really help


flexer1n1

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

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