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

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Chemistry

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?

Answer & Explanation Solved by verified expert
3.7 Ratings (535 Votes)
we know that moles mass molar mass so moles of Zn2P207 018 30476 so moles of Zn2P207 5906 x 104 now moles of Zn 2 x moles of Zn2P207 moles of Zn 2 x 5906 x 10 4 moles of    See Answer
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