a student has a water sample containing 0.503 g of NaH2PO4*H2O dissolved in the

Question

a student has a water sample containing 0.503 g of NaH2PO4*H2O dissolved in the water.

Each mole of NaH2PO4*H2O results in 1 mole of PO4 -3 dissolved in the water.

The student precipitates the phosphate in the water as struvite, vacuum filters to obtain the precipitate and quickly weighs the product. The mass of the student's precipitate is 1.3245g.

A fellow student calculates the % yield and says,

"These numbers don't make any sense!"

Why is the fellow student confused by the numbers? Can you suggest a reason for these results?

Explanation / Answer

NaH2PO4

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