Stoichiometry 4

Recently in class, we dug out some old information from the Aspirin Lab we did a while ago, and used it to apply to this unit by calculating the percent yield of the reaction from the lab. The balanced chemical reaction that we began with was:

C7H6O3(s) + C4H6O3(aq) --> C9H8O4(s) + C2H4O2(aq)

Stoichiometry 3

The exam for the Stoichiometry unit is soon. In this unit, we have learned about what a limiting reagent is and how to identify and calculate its mass based on the mass of the other reactant. We also learned about how to calculate theoretical yield and how that contributes to percent yield. Based upon what we have learned as well as the last quiz we took, I feel that the test will be moderately difficult. Luckily, the test is only twelve questions.

Stoichiometry 2

Today in class, we finished up the Iron Lab. In this lab, we placed a nail in a baby food jar filled with Copper Chloride. We let it sit for a few days, and then we took the mass of both the baby food jar (now with the resulting solid copper) and the nail. This lab relates to what we've been learning in class because after the lab, we had to calculate theoretical yield and percent yield.

Stoichiometry

Today was our Stochiometry weekly quiz #1. I have the formulas down, but for some reason my answers didn't turn out right all the time. Did anyone else have that problem or is it just me? Just in case, if anyone might need these, here are some helpful websites regarding Stoichiometry.