Exercise 10 Report Form:  Electrochemistry – Galvanic Electrochemical Cells

 

Name: _________________________________         Date:  ____________________

Lab Partner: _____________________________        Instructor: ________________

 

Electrochemical cells:

Reaction Zn + Cu2+ (0.10 M) ® Zn2+ (0.10 M) + Cu Zn + Fe2+ (0.20 M) ® Zn2+ (0.10 M) + Fe Fe + Cu2+ (0.10 M) ® Fe2+ (0.20 M) + Cu Zn + Br2 (sat’d) ® Zn2+ (0.10 M) + 2 Br– (0.5 M) Cu + Cu2+ (0.10 M) ® Cu2+ (1.0×10-5 M) + Cu
(2 points) Measured potential (V)          
(2 points) Calculated potential (V)          
(2 points) Which substance is oxidized?          
(2 points) Which substance acts as the cathode?          
(1 point) The e– flow from which electrode?          
(1 point) The e– flow to which electrode?          

 

  1. (1 point) In a spontaneous electrochemical cell, at which electrode does reduction occur?
  2. (1 point) In a spontaneous electrochemical cell, at which electrode does oxidation occur?
  3. (1 point) In a spontaneous electrochemical cell, electrons flow from which electrode to which electrode?
  4. (2 points) For full credit, show your calculation of the ‘Calculated Potential’ for the Cu/Cu concentration cell.