The active ingredient in a zinc nutritional supplement isZnSO4·7H2O (molar mass = 287.58 g/mol). Ten zinc tablets containinga mix of the active ingredient and an inactive filler were groundand mixed together thoroughly. The total mass of these ten tabletswas 11.890 g. A 2.242 g sample of the finely ground tablets wasdissolved in an acidic solution. The solution was neutralized withammonia and subsequently warmed in a water bath. Addition of(NH4)3PO4 to the solution resulted in the precipitation ofZnNH4PO4. The precipitate was filtered and dried, then ignited toproduce 0.180 g of Zn2P2O7 (molar mass = 304.76 g/mol).
1- What is the mass percent of ZnSO4·7H2O in each tablet?
2 and 3- What is the average mass of the active ingredientZnSO4·7H2O and inactive filler in each tablet?
