The creation of s’mores is actually a good allusion to the whole concept of stoichiometry, where the relationship between the masses of the reactants (components) and products is studied in great detail. In our experiment, the components weighed in as follows: Chocolate: 11 grams Marshmallow: 1.2 grams Graham Cracker: 3.7 grams Each s’more we made had 2 marshmallows, 2 graham crackers, and one piece of chocolate. With that, one s’more weighed in at 20.85 grams. We can say that the mass of the s’more was approximately equal to the combined masses of all components, just as the mass of a compound is equal to that of the components that make it. However, we could only form two s’mores with the current formulation, since there were only 2 pieces of chocolate. In effect, the chocolate limited our production capacity. In this way, the chocolate is the limiting reagent as it is the component fully used in the reaction. We had a lot of spares as far as crackers and marshmallows go, making these excess reagents. With all these in mind, we can say that the amount of compound produced is dependent on the combination ratio of the different components, and it also depends on the component with the least amount. Overall, it was a good allusion to the idea of stoichiometry, in that it really showed you that the mass of 1 unit of a compound really depended on the ratio at which the components combined, and the masses of each component, while the amount of it that can be formed was dependent on the component that came in the least amount. Aside from this, eating on the s’mores was a nice experience too, since to be honest, it was my first time to try it for real.
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