SOLVED: In one experiment, we reacted calcium chloride, CaCl2, withsodium phosphate, Na3PO4, to produce calcium phosphate, Ca3(PO4)2,as a precipitate. A student reacted 0.422 g of CaCl2 with excesssodium phosphate. After filtering and drying the Ca3(PO4)2precipitate, the student the mass of the precipitate was 0.372 g.What is the percent yield of Ca3(PO4)2 collected by thestudent?

SOLVED: You placed a sample of a hydrate of calcium (CaCl2) chloride in a weighed test tube and weighed the filled test tube. Then you heated it until no more water was evolved. After cooling, you weighed the test tube again. Mass of empty tube (g): 13.99 Mass of filled tube before heating (g): 18.09 Mass after cooling (g): 16.8 Calculate the following: Mass of water evolved.