Name: Brian Nelson
Partners Name: Chris
The Stoichiometry of S’mores
Data
1. Mass and record one of each reactant.
Reactant | Mass (g) |
1 Chocolate Square | 3.68 g |
1 Marshmallow | 9.46 g |
1 Graham cracker (4 squares) | 14.96 g |
2. Reaction
2G2 + 2M + 3C -> G4M2C3
3. One total S’more: 58.01 g
Post lab Questions
1. Relationship between the mass of a S’more and the masses of the reactants used to make it.
The relationship is that all of the masses of the reactants added up together make the mass of the S’more.
2. The limiting reaction is the graham crackers since we didn’t have enough crackers to create another S’more.
3. What were the excess reactants?
Excess Reactant | Mass (g) |
Chocolate Square | 22.08 g |
Marshmallow | 18.92 g |
Graham cracker | 14.96 g |
4. If you had started with 100g of each reactant how many S’mores could you make.
You could make three S’mores
C 100/3.68 = 27.17
M 100/9.46 = 10.57
G 100/14.96 = 6.68
5. The limiting reaction would be the Graham crackers.
6. What would be the mass of each excess reactant
.68 Graham cracker * 14.96 = 10.17 g of a G
4.57 Marshmallow * 9.46 = 43.23 g of M
18.17 Chocolate * 3.68 = 66.86 g of C
B, you're a doing a great job with this blog. 2 comments: don't put your partner's full name in the lab, make sure to show your calculations. Word has a great equation editor that will allow you to put in all your work instead of just the answers. I would be happy to show you how to use it to make your work easier to follow.
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