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Unformatted text preview: 4 + 3 Na 2 SO 4 1 Fe 2 (SO 4 ) 3 + 2 Na 3 PO 4 2) If I perform this reaction with 25 grams of iron (III) phosphate and an excess of sodium sulfate, how many grams of iron (III) sulfate can I make? 33 grams 3) If 18.5 grams of iron (III) sulfate are actually made when I do this reaction, what is my percent yield? (18.5 / 33) x 100% = 56% 4) Is the answer from problem #3 reasonable? Explain. Yes. Any yield under 100% is reasonable under the law of conservation of mass. 5) If I do this reaction with 15 grams of sodium sulfate and get a 65.0% yield, how many grams of sodium phosphate will I make? According to the stoichiometry, the theoretical yield is 11.5 grams. Multiplying this by 0.650, you get 7.48 grams. For chemistry help, visit www.chemfiesta.com 2002 Cavalcade Publishing All Rights Reserved...
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- Fall '09