Thursday
April 24, 2014

Homework Help: Chemistry

Posted by Bob on Monday, February 23, 2009 at 9:39am.

What is the theoretical yield of calcium carbonate if 2.97 grams of calcium chloride dihydrate reacts with excess sodium carbonate according to the balanced chemical reaction shown below?
CaCl2•2H20(aq)+Na2CO3(aq)->CaCO3(aq)+2NaCL(aq)+2H20(I)

Please use molar mass values calculated and rounded to the hundredths place, and round your answer to the hundredths place.

to find the molar mass, i did:
Ca = 40.08
Cl2 = (35.45) x 2 = 70.9
2H2O = (18.02) x 2 = 36.04

40.08 + 70.90 + 36.04 = 147.02 g/mol

To find the theoretical yield, i did:
2.97g CaCl•2H2O x (1 mol CaCl•2H2O/147.02g CaCl•2H2O) x (1 mol CaCO3/1 mol CaCl•2H2O) x (100.09/1 mol CaCO3) = 2.04 g

Did I do the theoretical yield equation correctly?

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