What is the equivalent weight of aluminum sulfate, al2(so4)3? (ans: 57 g/mol).
ew = mw / (oxidation #)
specifically, i need a detailed explanation of how to solve for the oxidation number.

The answer is true for your question.

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.

The answer is c.  na2haso4  and na2so4