Calculate the molar concentration of potassium sulfite equivalent if titration of an aliquot part of a solution of this substance with a volume of 10.0 ml consumes 10.17 ml of a titrant of potassium permanganate (c1/Zt) = 0.0950 mol/l. Write: a) reaction scheme; b) factors of equivalence of participants of reaction; c) the expression of the law of equivalents for this reaction; d) type of chemical reaction (titration method); e) indicator for determination of equivalence point (choice to explac)