1. Balancing electron transfer reactions. (Redox Tutorial; Krauskopf & Bird, Ch. 9, pg. 217- 235) + stoichiometrically balance the following overall reactions. For some, you may need to add H OH. Start by writing balanced half-potential reactions and then combining them into overall reactions. Make sure your final reactions are both mass and charge balanced ã 2+ assume low pH, use H (a) Fe(Cr0H (b) HS + MnO4 = S(s) +MnO2(s) (c) CH3OH + O2 = CO2 + H2O to balance assume high pH, use OH to balance assume low pH, use H' to balance