Use The Oxidation Number Method To Balance The Following Redox Equations.?
May 12th, 2009
Use the oxidation number method to balance the following redox equations.
Zn+NO3 ——> Zn^2+NO3
Cu+NO3 —–> Cu^2 + NO
Entry Filed under: Chemical Equation
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1 Comment Add your own
1. Timi | May 12th, 2009 at 10:58 pm
Zn + 4 HNO3 —-> Zn(NO3)2 + 2 NO2 (g) + 2 H2O
oxidation numbers(left side): Zn: 0, H: +1, O: -2, N: +5,
oxidation numbers (right side) : Zn: +2, N(in HNO3): +5, O: -2, N(in NO2): +4
Zn: 0 => +2 (+2) | *1
N: +5=> +4 (-1) | *2
3Cu+ 8HNO3—-> 3Cu(NO3)2 + 2NO +4H2O
oxidation numbers(left side): Cu: 0, H: +1, O: -2, N: +5
oxidation numbers (right side) : Cu: +2, N(in HNO3): +5, O: -2, N(in NO): +2
Cu: 0 => +2 (+2) |*3
N: +5 => +2 (-3) |*2
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