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(a) Which of the following mixtures are buffer solutions? a. 1.0 M HF +0.50 M HCI b. 0.10 M HCN + 0.10 M Na+CN- c. 0.025 M HCI + 0.025 M Na+Cl- d. 0.10 M HCI + 0.50 M NaOH e. 0.25 M NH3 + 0.50 M NH4+CI- (b) A buffer solution is prepared by mixing 0.25M K*CN and 0.20M HCN . What is the pH of the buffer solution prepared? (pKa of HCN = 4.24)

(a) Which of the following mixtures are buffer solutions? a. 1.0 M HF +0.50 M HCI b. 0.10 M HCN + 0.10 M Na+CN- c. 0.025 M HCI + 0.025 M Na+Cl- d. 0.10 M HCI + 0.50 M NaOH e. 0.25 M NH3 + 0.50 M NH4+CI- (b) A buffer solution is prepared by mixing 0.25M K*CN and 0.20M HCN . What is the pH of the buffer solution prepared? (pKa of HCN = 4.24)

General Chemistry - Standalone book (MindTap Course List)
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter16: Acid-base Equilibria
Section: Chapter Questions
Problem 16.147QP
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5) Buffers: (a) Which of the following mixtures are buffer solutions? a. 1.0 M HF + 0.50 M HCI b. 0.10 M HCN + 0.10 M Na*CN- c. 0.025 M HCI + 0.025 M NaCl- d. 0.10 M HCI + 0.50 M NaOH e. 0.25 M NH3 + 0.50 M NH4+CI- (b) A buffer solution is prepared by mixing 0.25M K*CN and 0.20M HCN. What is the pH of the buffer solution prepared? (pKa of HCN = 4.24)
Transcribed Image Text:5) Buffers: (a) Which of the following mixtures are buffer solutions? a. 1.0 M HF + 0.50 M HCI b. 0.10 M HCN + 0.10 M Na*CN- c. 0.025 M HCI + 0.025 M NaCl- d. 0.10 M HCI + 0.50 M NaOH e. 0.25 M NH3 + 0.50 M NH4+CI- (b) A buffer solution is prepared by mixing 0.25M K*CN and 0.20M HCN. What is the pH of the buffer solution prepared? (pKa of HCN = 4.24)
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