1.) The precipitate that you have formed is MgNH4PO4.6H2O.
a.) Calculate its formula weight (molecular weight).
b.) From this formula and the mass of the percolate you obtained, calculate the number of grams phosphorus, P in the plant food.
c.) From the number of grams of phosphorus, calculate the number of grams of P2O5 in the plant food.
d.) Calculate the %P2O5 in the plant food. How does your value compare with the value listed on the plant food label?
2.) Amber R Coyler, by mistake, started the experiment with 2.86 grams of another type of fertilizer- " Hyponex plant powder" that has an NPK label of 7-6-19. At the end of the experiment ,she obtained a precipitate with a mass of 0.165 g. Calculate the % P2O5. in the plant food. How does her value compare to the value shown on the label?