PostLab Electrochemical Cells

PostLab Electrochemical Cells - Post-Lab Data Summary Note...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Post-Lab Data Summary Note : some questions will display a variable like "nCount" or "SyInput" instead of an actual number in the data summary. Q# Question Text 5) Part I Analysis. Scoring Scheme: 3-2-1-1 Given the Nernst equation, E cell = (E 0 cathode - E 0 anode ) - [0.0257/n]lnQ, and the equation, E 0 cell = E 0 cathode - E 0 anode , substitute E 0 cell into the Nernst equation and solve for E 0 cell . Which of the following would be the correct expression for E 0 cell ? Your Answer: c. E 0 cell = E cell + [0.0257/n]lnQ You Scored 3 points out of 3 Possible 6) Part I Analysis. Scoring Scheme: 3-2-1-1 For the cell, Zn(s) | Zn(NO 3 ) 2 (0.10M) || Cu(NO 3 ) 2 (0.10M) | Cu(s), which of the following is the correct spontaneous overall cell reaction: Your Answer: a. Zn(s) + Cu 2+ (aq) -> Zn 2+ (aq) + Cu(s) You Scored 3 points out of 3 Possible 7) Part I Analysis. Data Entry - No Scoring Please enter the value of E cell you measured in volts for the spontaneous cell reaction for Zn(s) | Zn(NO 3 ) 2 (0.10M) || Cu(NO 3 ) 2 (0.10M) | Cu(s). E cell = Your Answer: 0.8910 No Points Possible 8) Part I Analysis. Scoring Scheme: 3-2-1-1 For the cell, Zn(s) | Zn(NO 3 ) 2 (0.10M) || Cu(NO 3 ) 2 (0.10M) | Cu(s), which of the following is the correct expression for Q, the reaction quotient in the Nernst equation, for the spontaneous overall cell reaction: Your Answer: a. Q = [Zn 2+ ]/[Cu 2+ ] You Scored 2 points out of 3 Possible 9) Part I Analysis. Scoring Scheme: 3-3-2-1 Using your cell concentrations and the reaction quotient expression, calculate and enter the value of Q for the Nernst equation for this cell, Zn(s) | Zn(NO 3 ) 2 (0.10M) || Cu(NO 3 ) 2 (0.10M) | Cu(s) Q = Your Answer: 1 You Scored 3 points out of 3 Possible 10) Part I analysis. Scoring Scheme: 3-3-2-1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Please enter the value of lnQ that appears in the Nernst equation for this cell, Zn(s) | Zn(NO 3 ) 2 (0.10M) || Cu(NO 3 ) 2 (0.10M) | Cu(s) . ln Q = Your Answer: 0 You Scored 3 points out of 3 Possible 11) Part I analysis. Scoring Scheme: 3-3-2-1 For the cell, Zn(s) | Zn(NO 3 ) 2 (0.10M) || Cu(NO 3 ) 2 (0.10M) | Cu(s), put all the terms together that enter into the equation for E 0 cell , and enter the value you calculated for it. E 0 cell = Your Answer: 0.8910 You Scored 3 points out of 3 Possible 12) Part I analysis. Data Entry - No Scoring Please enter the accepted value from the table in your text for the standard electrode potential, E 0 , for the half-cell reaction for copper: Cu 2+ (aq) + 2e - -> Cu(s) in volts. You will use this value as a reference to calculate the standard electrode potentials for the other half- reactions involved in the cells you measured. E 0 (Cu 2+ /Cu) = Your Answer: 0.34 No Points Possible 13) Part I analysis. Scoring Scheme: 3-3-2-1
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/15/2010 for the course CHE 2C 55225 taught by Professor Toupadakis during the Fall '10 term at UC Davis.

Page1 / 8

PostLab Electrochemical Cells - Post-Lab Data Summary Note...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online