По данным схемам составьте схемы электронного и уравнения окислительно восстановительных реакций а) v2o5+al=al2o3+v б) nh3+o2=n2+h20 в) hno3+cu=cu(no3)2+no2+h2o
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2
а)3V2O5+10AL=5AL2O3+6V
V(+5)+5e=V(0) ок-ль
Al(0)-3e=Al(+3) в-ль
б)4NH3+3O2=2N2+6H20
2N(-3)-6e=N2(0) в-ль
O2(0)+2e=2O(-2)ок-ль
в)4HNO3+Cu=Cu(NO3)2+2NO2+2H2O
N(+5)+1e=N(+4)
Cu(0)-2E=Cu(+2)