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Unformatted text preview: Ca2+, Mg2+ Al3+, Zn2+, Ag1+, Cd2+ 4. Oxygen is always , -2 , when combined with other stuff. Oxide state. 5. H is always +1, when combined (unless a previous rule is in effect) Hydride H H-NaH : 1+, 1-MnO4- + Fe2+ Fe3+ + Mn2+ In aqueous free to add H2O to either side (use as needed) Acidic: Free to add H+ to either side Basic: Free to add OH-*make sure to check charge balance Right way: MnO4- + Fe2+ Fe3+ + Mn2+ MnO4- Mn2+ , +7 +2, ADD 5electrons Fe2+ Fe3+, +2 +3, LOSE one electron...
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