1. The problem statement, all variables and given/known data Equivalence factor of the salt is FeSO4.Cr2(SO4)3.24H2O is Ans is 8. 2. Relevant equations 3. The attempt at a solution Equivalence factor of an acid or base is its basicity or acidity, and for a compound undergoing redox reaction, it is the number of electrons exchanged per mole of compound. I'm not sure how to go about in the case of the given salt.