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Netflix .rx Home | Chegg.com xCHEM271-22222225,222 x / wwN9047: HW 9-Electr x -> C D smartwork.Wwnorton.com/sw/mod/smartwork/view.php?id=463963&isStudent-l; A voltaic cell with an aqueous electrolyte is based on the reaction between Cd2 (aq) and Mg(s), producing Cd(s) and Mg2+(aq). Write half-reactions for the anode and cathode and then write a balanced cell reaction. Please include the states of matter in the equations. anode: cathode: cell: 12:43 PM dll ^4) 11/27/2015 | Search the web and Windows

Explanation / Answer

1. Anode:   Mg (s) = Mg2+ (aq) + 2e

Cathode : Cd2+ (aq) + 2e = Cd (s)

Cell reaction : Mg (s) + Cd2+ (aq) = Mg2+ (aq) + Cd (s)

2. Anode : Cd (s) + 2 OH- (aq) = Cd(OH)2 (s) + 2e

Cathode : NiO2 (s) + 2e + 2 H2O = Ni(OH)2 (s) + 2 OH- (aq)

Cell reaction: Cd (s) + NiO2 (s) + 2 H2O = Cd(OH)2 (s) + Ni(OH)2 (s)

3. Anode: Sn (s) = Sn2+ (aq) + 2e

Cathode: 2 Ag+ (aq) + 2e = 2Ag (s)

Cell reaction: Sn (s) + 2 Ag+ (aq) = Sn2+ (aq) + 2Ag (s)

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