a. Which of the following mixtures is a buffer solution? (Circle all that apply.) (A) Solution A: 200.OmL 0.40M HCI & 200.0mL 0.40M KCI (B) Solution B: 200.0mL 0.35M HCN & 200.0mL 0.40M NaCN (C)Solution C: 500.0mL 0.40M CH;NH2 & 500.0mL 0.40M CH;NH3B (D)Solution D: 200.0mL 0.25M HCN & 75.0mL 0.25M KOH b. Calculate the pH of Solutions B and D listed above. The Ka of HCN is 4.9 x 1010.

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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a. Which of the following mixtures is a buffer solution? (Circle all that apply.)
(A) Solution A: 200.0mL 0.40M HCI & 200.0mL 0.40M KCI
(B) Solution B: 200.0mL 0.35M HCN & 200.0mL 0.40M NaCN
(C) Solution C: 500.0mL 0.40M CH3NH2 & 500.0mL 0.40M CH3NH3B.
(D)Solution D: 200.0mL 0.25M HCN & 75.0mL 0.25M KOH
b. Calculate the pH of Solutions B and D listed above. The Ka of HCN is 4.9 x 10-10.
Transcribed Image Text:a. Which of the following mixtures is a buffer solution? (Circle all that apply.) (A) Solution A: 200.0mL 0.40M HCI & 200.0mL 0.40M KCI (B) Solution B: 200.0mL 0.35M HCN & 200.0mL 0.40M NaCN (C) Solution C: 500.0mL 0.40M CH3NH2 & 500.0mL 0.40M CH3NH3B. (D)Solution D: 200.0mL 0.25M HCN & 75.0mL 0.25M KOH b. Calculate the pH of Solutions B and D listed above. The Ka of HCN is 4.9 x 10-10.
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