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Author Question: Consider a solution consisting of the following two buffer systems: H2CO3HCO3 + H+ pKa = 6.4 ... (Read 40 times)

awywial

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Question 1

Calculate the pH of a solution that is 2.00 M HF, 1.00 M NaOH, and 0.699 M NaF. (Ka = 7.2 10–4)

3.14
3.37
2.69
2.91
None of these are correct.

Question 2

Consider a solution consisting of the following two buffer systems:
              H2CO3HCO3 + H+     pKa = 6.4
              H2PO4HPO42– + H+     pKa = 7.2
At pH 6.4, which one of the following is true of the relative amounts of acid and conjugate base present?

[H2CO3] > [HCO3] and [H2PO4] > [HPO42–]
[H2CO3] = [HCO3] and [H2PO4] > [HPO42–]
[H2CO3] = [HCO3] and [HPO42–] > [H2PO4]
[HCO3] > [H2CO3] and [HPO42–] > [H2PO4]
[H2CO3] > [HCO3] and [HPO42–] > [H2PO4]


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Marked as best answer by awywial on Mar 21, 2021

succesfull

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awywial

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Reply 2 on: Mar 21, 2021
Thanks for the timely response, appreciate it


billybob123

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Reply 3 on: Yesterday
:D TYSM

 

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