chemistry equation help?

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Basketballgrl21

New member
Im having trouble with the following concepts,so any help is appreciated


Use the oxidation number method to balance the following redox equation
2Al+3I2-->2Al(3+)+6I(-)

Identify each of following changes as oxidation or reduction half reactions.
Al+I2-->Al (3+)+I(-)

MnO2+Br(-)-->Mn(+2)+Br2
 
Well... oxidation number for Oxygen is ALWAYS -2
ignore the big numbers when doing oxidation and redox reactions. If a element is on its own it is always 0
 
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