Which of the following mixtures would result in a buffered solution when 1.0 L of each of the two solutions are mixed. А. О.2 М HNОз and 0.4 M HF B. 0.2 M HNO3 and 0.4 M NaF С. О.2 М HNОз and 0.4 M NaOH D. 0.2 M HNO3 and 0.2 M NaNO3

Which of the following mixtures would result in a buffered solution when 1.0 L of each of the two solutions are mixed. А. О.2 М HNОз and 0.4 M HF B. 0.2 M HNO3 and 0.4 M NaF С. О.2 М HNОз and 0.4 M NaOH D. 0.2 M HNO3 and 0.2 M NaNO3

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Which of the following mixtures would result in a buffered solution when 1.0 L of each of the two solutions are mixed.
А. О.2 М HNОз and 0.4 M HF
B. 0.2 M HNO3 and 0.4 M NaF
С. О.2 М HNОз and 0.4 M NaOH
D. 0.2 M HNO3 and 0.2 M NaNO3

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Which of the following, when mixed, would NOT result in a buffer solution? а. 10 mL of 0.1M HCI and 20 mL of 0.1 M NH3 O b. 10 mL of 0.1 M HCI and 20 mL of 0.1 M NaC2H3O2 C. 10 mL of 0.1 M NaOH and 20 mL of 0.1 M potassium cyanide, KCN d. 10 mL of 0.1 M NaOH and 20 mL 0.1 M HF e. 10 mL of 0.1 M acetic acid, HC2H3O2, and 10 mL of 0.1 M sodium acetate, NaC2H3O2
5. Which of the following pairs will not form a buffer when mixed together in an aqueous solution? a. Na2HPO4 and KH2PO4 b. HF and NaF c. NaCl and NaOH d. HOCl and NaOCl e. all of the above are buffers
6. Consider a solution that has 0.00500 M HCl and 0.100 M HF. Ka of HF = 7.2x10-4. a. What is the pH of this solution? b. Suppose the solution was like that in A but also had 0.1 M HOI. (i.e. total solution was a mix of 0.00500 M HCl, 0.100 M HF, and 0.1 M HOI). Ka of HOI = 2.0x10-¹¹. Does this solution have an appreciably different pH than the solution in part a? Support your answer with relevant calculations. HINT: Work from strongest acid to the weakest acid.
7. A solution was made by mixing 50.0 mL of 0.750 M HCN with 25.0 mL of water. What is the pH of this solution? The pka of HCN = 9.31. 8. One of the compounds featured on the TV series "Breaking Bad" was hydrofluoric acid (HF), pKa = 3.14. a) A solution of HF has a pH = 1.77. What was the initial [HF] for this solution in mol L-1? b) What is the equilibrium concentration of F in this solution in mol L-1? c) What is the percent ionization of HF in this solution?
explain step by step
A 1.00 liter solution contains 0.54 M ammonia and 0.42 M ammonium chloride. If 0.21 moles of hydrobromic acid are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of hydrobromic acid.) vA. The number of moles of NH3 will increase. v B. The number of moles of NH.* will remain the same. v C. The equilibrium concentration of H3O* will increase. vD. The pH will decrease. E. The ratio of [NH3] / [NH4*] will decrease.