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Lab #7: Gravimetric Plantfood Analysis

Pre-lab Questions: Name__________________________ Date___________________________ 1. Calculate the MM of MgNH4PO4 .6H2O.

2. Assuming 100% theoretical yield, how many grams of P2O5 can be produced from 35.0grams of PO43-?

3. What is the percentage P2O5 in a name brand plantfood if the starting mass of a sample of plantfood was 200.00grams and the experimentally determined mass of P2O5 was 30.5 grams?