One-half the class was at the "Aids Day Workshop". Those who were present received a quick review of percent yield problems. We discussed the percent yield equation (see graphic below). We discussed how the yield in a given reaction refers to the amount of product that is produced. When conducting an experiment, the actual amount of yield is often less than the theoretical amount of yield. Spillage and other means of losing materials is the cause of the actual yield being less than the theoretical yield. The theoretical yield of product (i.e., the mass of product that we expect to obtain in a reaction) is related to the mass of reactants via the usual stoichiometry calculations.
We then took time to work on a handout on percent yield. Access Handout on course website.
The answers to the handout are shown below. For the first two columns of the table, think stoichiometry.
We will do more tomorrow on the topic of percent yield and review for the Friday exam. A review sheet for the exam should be up by the end of day on Wednesday.
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