redox half-reation question

Question

S4O62- → 2S2O32-
Will this redox half-reaction will be balanced if you add 2 electrons to the product side?

Answer 1

NO.  You would have to add 2 electrons to the REACTANT side to have a -4 net charge on both sides.

Currently, the equation shows -2 on the left (reactants) and -4 on the right (products).