Write cell reactions for the electrochemical cells diagrammed here, and use data

Question

Write cell reactions for the electrochemical cells diagrammed here, and use data from the table to calculate Ecell for each reaction.

You may want to reference (Page) Section 19.1 while completing this problem.

Part A) Al(s)|Al3+(aq)||Sn2+(aq)|Sn(s)

Express your answer as a net ion equation. Identify all of the phases in your answer.

Part B) Calculate Ecell for the reaction in part A.

Express your answer to three decimal places and include the appropriate units

Part C) Pt(s)|Fe2+(aq),Fe3+(aq)||Ag+(aq)|Ag(s)

Express your answer as a net ion equation. Identify all of the phases in your answer.

Part D) Calculate Ecell for the reaction in part C.

Express your answer to three decimal places and include the appropriate units.

Explanation / Answer

Part A)

Net ionic :

2 Al (s) + 3 Sn+2 (aq)   ----------> 2 Al+3 (aq) + 3 Sn (s)

Part B)

Eocell = Eocathode - Eoanode

          = - 0.14 - (- 1.66)

Ecell = 1.520 V

Part C) Pt(s)|Fe2+(aq),Fe3+(aq)||Ag+(aq)|Ag(s)

Net ionic :

Fe+2 (aq) + Ag+ (aq)   ------------> Fe+3 (aq) + Ag (s)

Part D)

Eocell = 0.80 - 0.771

           = 0.029 V

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