2Cr(NO3)3+3NaViO3+6HNO3=>H2Cr2O7+3Vi(No3)3+3NaNO3+2H2O
2Cr^{+3}-6e = 2Cr{+6} |1
Vi^{+5}+2e = Vi{+3} |3
2Cr(NO3)3+3NaViO3+6HNO3=>H2Cr2O7+3Vi(No3)3+3NaNO3+2H2O
2Cr^{+3}-6e = 2Cr{+6} |1
Vi^{+5}+2e = Vi{+3} |3