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Under standard conditions, the galvanic cell shown above has a cell potential of+1.56 V using the reaction given. The salt bridge contains KNO3, which allows K+ ions and NO, ions to move in the directions indicated. If KNO3 in the salt bridge is replaced with KOH, some Zn(OH), (s) precipitates in the Zn-Zn(NO,), half-cell. Which of the following best explains how the cell potential is affected as Zn(OH), (s) starts to precipitate, and why? The cell potential increases because the concentration of Zn2+(ag) decreases and Q. ,becomes smaller. |Ag"* The cell potential decreases because the concentration of Zn2+ (aq) decreases and Q, Zn2 becomes smaller. The cell potential increases because Kt ions replace Zn?+ ions and the reduction of K* is more thermodynamically favored than the reduction of Zn?+. D The cell potential stays the same because Zn(OH), (s) is not part of the redox reaction responsible for the operation of the galvanic cel.

Under standard conditions, the galvanic cell shown above has a cell potential of+1.56 V using the reaction given. The salt bridge contains KNO3, which allows K+ ions and NO, ions to move in the directions indicated. If KNO3 in the salt bridge is replaced with KOH, some Zn(OH), (s) precipitates in the Zn-Zn(NO,), half-cell. Which of the following best explains how the cell potential is affected as Zn(OH), (s) starts to precipitate, and why? The cell potential increases because the concentration of Zn2+(ag) decreases and Q. ,becomes smaller. |Ag"* The cell potential decreases because the concentration of Zn2+ (aq) decreases and Q, Zn2 becomes smaller. The cell potential increases because Kt ions replace Zn?+ ions and the reduction of K* is more thermodynamically favored than the reduction of Zn?+. D The cell potential stays the same because Zn(OH), (s) is not part of the redox reaction responsible for the operation of the galvanic cel.

Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter23: Potentiometry
Section: Chapter Questions
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Under standard conditions, the galvanic cell shown above has a cell potential of+1.56 V using the reaction given. The salt bridge contains KNO3, which allows K ions and NO, ions to move in the directions indicated. If KNO3 in the salt bridge is replaced with KOH, some Zn(OH), (s) precipitates in the Zn-Zn(NO,), half-cell. Which of the following best explains how the cell potential is affected as Zn(OH), (s) starts to precipitate, and why? The cell potential increases because the concentration of Zn2+(ag) decreases and Q. ,becomes smaller. |Ag" The cell potential decreases because the concentration of Zn2+ (ag) decreases and Q, Zn becomes smaller. (Ag The cell potential increases because Kt ions replace Zn2+ ions and the reduction of K* is more thermodynamically favored than the reduction of Zn?+. D The cell potential stays the same because Zn(OH), (8) is not part of the redox reaction responsible for the operation of the galvanic cell.
Transcribed Image Text:Under standard conditions, the galvanic cell shown above has a cell potential of+1.56 V using the reaction given. The salt bridge contains KNO3, which allows K ions and NO, ions to move in the directions indicated. If KNO3 in the salt bridge is replaced with KOH, some Zn(OH), (s) precipitates in the Zn-Zn(NO,), half-cell. Which of the following best explains how the cell potential is affected as Zn(OH), (s) starts to precipitate, and why? The cell potential increases because the concentration of Zn2+(ag) decreases and Q. ,becomes smaller. |Ag" The cell potential decreases because the concentration of Zn2+ (ag) decreases and Q, Zn becomes smaller. (Ag The cell potential increases because Kt ions replace Zn2+ ions and the reduction of K* is more thermodynamically favored than the reduction of Zn?+. D The cell potential stays the same because Zn(OH), (8) is not part of the redox reaction responsible for the operation of the galvanic cell.
Voltmeter Wire +1.56 V K+ NO3 Ag Zn 1 M AgNO3 1 M Zn(NO3)2
Transcribed Image Text:Voltmeter Wire +1.56 V K+ NO3 Ag Zn 1 M AgNO3 1 M Zn(NO3)2
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