Stoichiometry Problems From Blog

Pg. 815 #28-33, 37, 38

Pg. 811 #26, 27

Stoichiometry Lab #1

Purpose:

Determine the percent yield of a double replacement reaction.

Procedure:

1. Mass evaporating dish.

2. Mass 2g Na2CO3.

3. Add HCl slowly until bubbling stops.

4. Heat until all water has evaporated

5. Mass NaCl

Data:

Mass of evaporating dish: 46.54g

Mass of Sodium Chloride: 2.00g

Mass of NaCl: 1.67g

Calculations:

Balanced Equation:

Theoretical Yield of NaCl:

Percent Yield:

1.67g/2.21g x100=75.57%yield

Conclusion:

This is the end. Just hold your breath and count to ten. Feel the earth move and bend. Just kidding. In this lab a chemical reaction produced saltwater which was then evaporated to find the mass or yield of salt. There was significant error because the amount in the lab was only 75.57% of the theoretical yield in this equation. Penguins.

Pg. 826 #45, 46

Pg. 802 #23

Pg. 793. #11-16