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The active ingredient in a zinc nutritional supplement is ZnSO4⋅7H2O (molar mass = 287.58 g/mol). Ten...

The active ingredient in a zinc nutritional supplement is ZnSO4⋅7H2O (molar mass = 287.58 g/mol). Ten zinc tablets containing a mix of the active ingredient and an inactive filler were ground and mixed together thoroughly. The total mass of these 10 tablets was 10.005 g. A 2.494 g sample of the finely ground tablets was dissolved in an acidic solution. The solution was neutralized with ammonia and subsequently warmed in a water bath. Addition of (NH4)3PO4 to the solution resulted in the precipitation of ZnNH4PO4. The precipitate was filtered and dried, then ignited to produce 0.272 g of Zn2P2O7 (molar mass = 304.76 g/mol). What is the mass percent of ZnSO4⋅7H2O in each tablet? What is the average mass of the active ingredient ZnSO4⋅7H2O and inactive filler in each tablet?

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queen_honey_blossom answered 2 years ago
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