Calculate the mass of NH4I in 100 ml solution if 10.15 ml of barium hydroxide titrant (c1/zT) = 0.003 mol/l is consumed for titration of an aliquot of 10.0 ml solution of this substance. 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)