Post Lab Questions:
A perfect percent yield would be 100%. Based on your results,describe your degree of accuracy and suggest possible sources oferror.
What impact would adding twice as muchNa2CO3 than required for stoichiometricquantities have on the quantity of product produced?
Determine the quantity (g) of pure CaCl2 in 7.5 g ofCaCl2•9H2O.
Determine the quantity (g) of pure MgSO4 in 2.4 g ofMgSO4•7H2O.
Conservation of mass was discussed in the background. Describehow conservation of mass (actual, not theoretical) could be checkedin the experiment performed.
Based on these findings:
Data Table 1. Stoichiometry Values
Initial: CaCl2•2H2O(g) | .68 |
Initial: CaCl2•2H2O(moles) | .0068 |
Initial: CaCl2 (moles) | .00368 |
Initial: Na2CO3(moles) | .0012 |
Initial: Na2CO3 (g) | .12 |
Theoretical: CaCO3 (g) | .68 |
Mass of Filter paper (g) | 1g |
Mass of Filter Paper + CaCO3 (g) | 1.7g |
Actual: CaCO3 (g) | .72g |
% Yield: | 103 |
