Today in class students reviewed some of the answers to the FRQ's related to Chapter 5 (Gases). If you need to see the answers to these FRQ's, you can look at this document. If you want to see a PowerPoint slide show that explains how the answers were obtained, you can click here to watch the slide show.
Students watched me perform a demonstration of how to calculate the molar mass of a volatile liquid. Even though I obtained rather poor results (i.e., 50% error!) from this experiment, it was still a decent thing to do. I wanted to emphasize that the molar mass of a gas is equal to (gRT)/(PV). You can see a YouTube video of another chemistry class doing this experiment by clicking here.
Students did a lab today involving the reaction of magnesium with hydrochloric acid to produce hydrogen gas. Based on the data collected from this experiment, students were able to calculate the value of the ideal gas law constant, R.
The homework for Friday's class is to complete the Chapter 5 Practice Test, which can be found here.
I will give out the take-home test for Chapter 5 on Friday, and it will be due on Monday.
E-mail me if you have any questions.
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