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Redox

In each of the following reactions, identify the atom oxidized, the atom reduced, and balance the equation.

1. KBr + Fe2(SO4)3 -> Br2 + K2SO4 + FeSO4

2. Sn + HNO3 + H2O -> H2SnO3 + NO

3. Cu + AgNO3 -> Ag + Cu(NO3)2

Calculate the cell potential for each of the following reactions and determine whether the reaction is spontaneous.

4. Cr+3 + 3Na -> Cr +3Na+

5. Mn+2 + Cd -> Mn + Cd+2

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