Balance the following skeleton reaction, calculate e° cell , and state whether the reaction is spontaneous:
1. mn2+(aq) + co3+(aq) > mno2(s) + co2+(aq) [acidic]
2. co3+(aq) + e− > co2+(aq)
3. mno2(s) + 4h+(aq) + 2e− > mn2+(aq) + 2h2o(l)
4. mno4−(aq) + 2h2o(l) + 3e− > mno2(s) + 4oh−(aq)
5. 2mn2+(aq) + 2e− > mn(s)