Balancing Redox Reactions – Ion-Electron Method

2023 1 question

1. On balancing the given redox reaction, $aCr_2O_7^{2-}+bSO_3^{2-}(aq)+cH^+(aq)\rightarrow2aCr^{3+}(aq)+bSO_4^{2-}(aq)+\frac{c}{2}H_2O(l)$ the coefficients a, b and c are found to be, respectively: