http://www.chemistrytutorsite.com/2009/05/12/use-the-oxidation-number-method-to-balance-the-following-redox-equations/ Chemistry Tutor Site--Your Free Chemistry Tutor Site Fri, 30 Jul 2010 08:31:55 +0000 http://wordpress.org/?v=2.7 hourly 1 http://www.chemistrytutorsite.com/2009/05/12/use-the-oxidation-number-method-to-balance-the-following-redox-equations/comment-page-1/#comment-1448 Timi Wed, 13 May 2009 04:58:35 +0000 http://www.chemistrytutorsite.com/?p=665#comment-1448 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 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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