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A student prepares three solutions, X, Y, and Z, as described in the table above. The values of Ka for the acidic species in the solutions are given in the table below. a) Using the information given below, write the letters of the solutions below to rank the solutions in order of increasing pH (lowest pH to highest pH). Explain your reasoning for the ranking (b) Does the pH of solution Y increase, decrease, or remain the same when 100 mL of water is added? Justify your answer. (c) The student adds 0.0010 mol of NaOH(s) to solution Y, and adds 0.0010 mol of NaOH(s) to solution Z. Assume that the volume of each solution does not change when the NaOH(s) is added. The pH of solution Y changes much more than the pH of solution Z changes. Explain this observation. Solution X 100 mL of 0.10 M NaOH(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Y 100 mL of 0.10 M NaBr(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Z 100 mL of 0.10 M HC,H;O,(aq) is mixed with 100 mL of 0.10 M NaC,H;0,(aq) Species K. HBr(aq) »I (very large) HC,H;O,(aq) 1.8 × 10-5

A student prepares three solutions, X, Y, and Z, as described in the table above. The values of Ka for the acidic species in the solutions are given in the table below. a) Using the information given below, write the letters of the solutions below to rank the solutions in order of increasing pH (lowest pH to highest pH). Explain your reasoning for the ranking (b) Does the pH of solution Y increase, decrease, or remain the same when 100 mL of water is added? Justify your answer. (c) The student adds 0.0010 mol of NaOH(s) to solution Y, and adds 0.0010 mol of NaOH(s) to solution Z. Assume that the volume of each solution does not change when the NaOH(s) is added. The pH of solution Y changes much more than the pH of solution Z changes. Explain this observation. Solution X 100 mL of 0.10 M NaOH(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Y 100 mL of 0.10 M NaBr(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Z 100 mL of 0.10 M HC,H;O,(aq) is mixed with 100 mL of 0.10 M NaC,H;0,(aq) Species K. HBr(aq) »I (very large) HC,H;O,(aq) 1.8 × 10-5

Chemistry
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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21 A student prepares three solutions, X, Y, and Z, as described in the table above. The values of Ka for the acidic species in the solutions are given in the table below. a) Using the information given below, write the letters of the solutions below to rank the solutions in order of increasing pH (lowest pH to highest pH). Explain your reasoning for the ranking (b) Does the pH of solution Y increase, decrease, or remain the same when 100 mL of water is added? Justify your answer. (c) The student adds 0.0010 mol of NaOH(s) to solution Y, and adds 0.0010 mol of NaOH(s) to solution Z. Assume that the volume of each solution does not change when the NaOH(s) is added. The pH of solution Y changes much more than the pH of solution Z changes. Explain this observation. Solution X 100 mL of 0.10 M NaOH(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Y 100 mL of 0.10 M NaBr(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Z 100 mL of 0.10 M HC,H;O,(aq) is mixed with 100 mL of 0.10 M NaC,H,O,(aq) Species K. HBr(aq) »I (very large) HC,H;O,(aq) 1.8 x 10-5
Transcribed Image Text:21 A student prepares three solutions, X, Y, and Z, as described in the table above. The values of Ka for the acidic species in the solutions are given in the table below. a) Using the information given below, write the letters of the solutions below to rank the solutions in order of increasing pH (lowest pH to highest pH). Explain your reasoning for the ranking (b) Does the pH of solution Y increase, decrease, or remain the same when 100 mL of water is added? Justify your answer. (c) The student adds 0.0010 mol of NaOH(s) to solution Y, and adds 0.0010 mol of NaOH(s) to solution Z. Assume that the volume of each solution does not change when the NaOH(s) is added. The pH of solution Y changes much more than the pH of solution Z changes. Explain this observation. Solution X 100 mL of 0.10 M NaOH(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Y 100 mL of 0.10 M NaBr(aq) is mixed with 100 mL of 0.10 M HBr(aq) Solution Z 100 mL of 0.10 M HC,H;O,(aq) is mixed with 100 mL of 0.10 M NaC,H,O,(aq) Species K. HBr(aq) »I (very large) HC,H;O,(aq) 1.8 x 10-5
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