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Консультация № 169683
21.06.2009, 13:13
0.00 руб.
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Дана молекулярная схема окислительно-востановительной рефкции:Cu+HNO3=>Cu(NO3)2+...
Используя метод электронно-ионных уравнений, составить уравнения рефкции.В электонно-ионных уравнениях указать процессы окисления и востоновления.Объяснить почему данная реакция возможно!
Используя метод электронно-ионных уравнений, составить уравнения рефкции.В электонно-ионных уравнениях указать процессы окисления и востоновления.Объяснить почему данная реакция возможно!
Обсуждение
22.06.2009, 16:35
общий
это ответ
Здравствуйте, Mitro.
Разбавленная азотная кислота, реагируруя с малоактивными металлами восстанавливается до NO
NO3-+4H++3e-[$8594$]NO+2H2O (потенциал [$966$](HNO3/NO)=0,957 В)
Окисление меди происходит согласно уравнению Cu-2e-[$8594$]Cu2+ (потенциал восстановления меди [$966$](Cu2+/Cu)=0,242 В)
Окисление меди азотной кислотой возможно, так как потенциал восстановления азотной кислоты больше, чем потенциал восстановления меди.
3Cu+8HNO3[$8594$]3Cu(NO3)2+2NO+4H2O
Разбавленная азотная кислота, реагируруя с малоактивными металлами восстанавливается до NO
NO3-+4H++3e-[$8594$]NO+2H2O (потенциал [$966$](HNO3/NO)=0,957 В)
Окисление меди происходит согласно уравнению Cu-2e-[$8594$]Cu2+ (потенциал восстановления меди [$966$](Cu2+/Cu)=0,242 В)
Окисление меди азотной кислотой возможно, так как потенциал восстановления азотной кислоты больше, чем потенциал восстановления меди.
3Cu+8HNO3[$8594$]3Cu(NO3)2+2NO+4H2O
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