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What is the effect on the emf of the cell shown in Figure 20.9 in the textbook, which has the overall reaction Zn(s) + 2H+ (aq)→Zn²+(aq) + H2 (9), for each of the following changes? Part A The pressure of the H2 gas is increased in the cathode compartment. The emf of the cell will increase. The emf of the cell will decrease. The emf of the cell will remain the same. Submit Previous Answers Correct Part B Zinc nitrate is added to the anode compartment. The emf of the cell will increase. The emf of the cell will decrease. The emf of the cell will remain the same. 0.76 V Voltmeter NO3 Na+ Zn anode Н.(8) Cathode half-cell NO3 Zn2+ (standard hydrogen electrode, SHE) Anode half-cell NO3 NO Zn(s) Zn²*(aq) + 2 e 2 H*(aq) + 2 e¯ → H2(g)

What is the effect on the emf of the cell shown in Figure 20.9 in the textbook, which has the overall reaction Zn(s) + 2H+ (aq)→Zn²+(aq) + H2 (9), for each of the following changes? Part A The pressure of the H2 gas is increased in the cathode compartment. The emf of the cell will increase. The emf of the cell will decrease. The emf of the cell will remain the same. Submit Previous Answers Correct Part B Zinc nitrate is added to the anode compartment. The emf of the cell will increase. The emf of the cell will decrease. The emf of the cell will remain the same. 0.76 V Voltmeter NO3 Na+ Zn anode Н.(8) Cathode half-cell NO3 Zn2+ (standard hydrogen electrode, SHE) Anode half-cell NO3 NO Zn(s) Zn²*(aq) + 2 e 2 H*(aq) + 2 e¯ → H2(g)

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
Chapter19: Electrochemistry
Section: Chapter Questions
Problem 19.145QP
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Can someone help me explain why emf will decrease for part A & B of this question? I'm confused and don't understand the reasoning behind the answer. 

What is the effect on the emf of the cell shown in Figure 20.9 in the textbook, which has the overall reaction Zn(s) + 2H+ (aq)→Zn²+(aq) + H2 (9), for each of the following changes? Part A The pressure of the H2 gas is increased in the cathode compartment. The emf of the cell will increase. The emf of the cell will decrease. The emf of the cell will remain the same. Submit Previous Answers Correct Part B Zinc nitrate is added to the anode compartment. The emf of the cell will increase. The emf of the cell will decrease. The emf of the cell will remain the same.
Transcribed Image Text:What is the effect on the emf of the cell shown in Figure 20.9 in the textbook, which has the overall reaction Zn(s) + 2H+ (aq)→Zn²+(aq) + H2 (9), for each of the following changes? Part A The pressure of the H2 gas is increased in the cathode compartment. The emf of the cell will increase. The emf of the cell will decrease. The emf of the cell will remain the same. Submit Previous Answers Correct Part B Zinc nitrate is added to the anode compartment. The emf of the cell will increase. The emf of the cell will decrease. The emf of the cell will remain the same.
0.76 V Voltmeter NO3 Na+ Zn anode Н.(8) Cathode half-cell NO3 Zn2+ (standard hydrogen electrode, SHE) Anode half-cell NO3 NO Zn(s) Zn²*(aq) + 2 e 2 H*(aq) + 2 e¯ → H2(g)
Transcribed Image Text:0.76 V Voltmeter NO3 Na+ Zn anode Н.(8) Cathode half-cell NO3 Zn2+ (standard hydrogen electrode, SHE) Anode half-cell NO3 NO Zn(s) Zn²*(aq) + 2 e 2 H*(aq) + 2 e¯ → H2(g)
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