Arkansas State University
Department of Chemistry
and Physics
Worksheet 2*
Theoretical Yield/ Percent Yield

*Since this is an added worksheet, students enrolled in CHEM1003 must check their answers by coming to my office (LSW549)

1. Given the following equation:

 K2CO3    +     HCl   g         H2O     +    CO2    +    KCl

 a)  Balance the equation.

 b) Determine the theoretical yield of KCl if you start with 34.5 g of  K2CO3.

 c) Starting with 34.5 g of  K2CO3, and you isolate 3.4 g of H2O, what is the percent yield?

2. Given the following equation:

  H2SO4    +      Ba(OH)2    g   BaSO4     +   H2O

If 98.0 g of H2SO4 is reacted with excess Ba(OH)2, determine the percent yield of BaSO4 if you isolate 213.7 g of BaSO4.

3. Given the following equation:

CaCl2    +   Li3PO4   g   LiCl    +   Ca3(PO4)2

If you start with 82.4 g of CaCl2 and you isolate 82.4 g of Ca3(PO4)2, what is your percent yield for this reaction?

4. Given the following equation:

 Cr(OH)3    +   HI   g    CrI3    +   H2O

If you start with 50.3 g of Cr(OH)3 and you isolate 39.5 g of CrI3, what is the percent yield?