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a. When Galvanic cells are made using the metals like Mg, Cu, Zn and Ag, what will be the nature of reactions in each cell? (Reactivity: Mg > Zn > Cu >Ag) b. How many Galvanic cells can be made by using the metals Ag, Cu, Zn and Mg? |
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Answer» a. i. Cu-Ag cell Anode: Cu (s) → Cu2+ (aq) + 2e- Cathode: Ag+ (aq) + le- → Ag(s) ii. Zn-Ag cell Anode: Zn (s) → Zn2+(aq) + 2e- Cathode: Ag+ (aq) + le- → Ag (s) (iii) Mg-Ag cell Anode: Mg (S) → Mg2+ (aq) + 2e- Cathode: Ag+ (aq) + le- → Ag (s) (iv) Zn – Cu cell Anode: Zn (s) → Zn2+ (aq) + 2e- Cathode: Cu2+ (aq)+ 2e- → Cu(s) (v) Mg-Cu cell Anode: Mg (s) → Mg2+ (aq) + 2e- Cathode: Cu2+ (aq) + 2e- → Cu (s) (vi) Mg-Zn cell Anode: Mg (s) → Mg2+ (aq) + 2e- Cathode: Zn2+ (aq) + 2e- → Zn(s) b. 6 cells |
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