For the reaction Fe2S3 + 5O2 2FeSO4+ SO2, the equivalent weight of Fe2S3 is

1 mole of Fe2S3 = 5 mole of O21 mole of O2 = 4 equivalents 1 mole Fe2S3 = 5 × 4 = 20 equivalents of O21 mole of Fe2S3 = Molecular weight ( M )M of Fe2S3 requires = 20 equivalents of O2X equivalents of Fe2S3 = 1 equivalent of O2Equivalent weight of Fe2S3 = M20