CuFeIIS2-II + 22 HNVO3 FeIII(NVO3)3 + Cu(NVO3)2 + 2 H2SVIO4 + 17 NIVO2 + 9 H2O

This is an oxidation-reduction (redox) reaction:

2 S-II - 16 e- 2 SVI (oxidation)

17 NV + 17 e- 17 NIV (reduction)

FeII - 1 e- FeIII (oxidation)

Change the oxidation states