Today I showed a simplified derivation of PV= nRT. You did some problems in the textbook and then derived 22.4. Then you did some PV = nRT with stoichiometry problems in the packet. Then I gave you an equation for density and molar mass and asked you to derive an equation for molar mass in terms of density using PV=nRT. Then you did a practice problem with that and we took a break.
The second half of class: started with an empirical and molecular formula problem that was mixed with PV=nRT and then I gave you the baggy challenge. Plump up a baggy with baking soda and vinegar.
HW: Textbook problems on empirical gas laws and ideal gas laws
Went over the Dumas Method of determining molar mass, then a bit of lecture on Real vs. Ideal Gases. I presented the van der Waals equation and then we did some problems in the packet (1982 and 1984)
Dalton’s law notes and derivation of mole fraction from partial pressures, notes on stoichiometry over water, etc. 2nd half we talked about why you can apply the mole ratio directly to the volume ratio when gases in a reaction are at constant P and T. Then we worked on the multiple choice questions.
Design lab: Determine the ideal gas constant R and show that it is constant for at least 2 different gases.
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545-615 Dinner (optional)
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Here’s your incentive: I will drop your lowest, non-missing grade for data collection, data analysis, and either one conclusion or one design grade during 2nd quarter. The plan is to do at least 2 design labs in 2nd quarter.
Time to review for redox quiz. Then you took quiz. Note to self: This quiz apparently takes 2 blocks!
KMT & Simulation
Gas laws review and practice. Read sections 5.1 and 5.2 or for video notes try these: 3.a.3.2 for Boyle, Charles and Gay-Lussac Problems, 3.a.3.3 for combined gas law, or this one that does not show math, just shows relationships between variables.
Do textbook problems: 5.39 to 5.49 odd only
No school. Veteran’s day.
Today’s class was broken up into two halves, but the whole class was spent working on the activity series lab. The first half we did the experimental part and the 2nd half we did the simulation. (See Google Classroom) At the end of class I went over how to write half reactions for single replacement reactions. (see video on unit 4 page for help)
Today we went over a bunch of the analysis questions on the activity series lab (google classroom) and then we practiced balancing more challenging redox reactions in acidic and basic solution. Most students made it through 2-3 redox reactions in the packet.
Today we worked on the Redox Titration lab (in packet and on google classroom). The first half you worked on the pre-lab – balancing redox rxns. The 2nd half you took data. Tomorrow we will work on the analysis. Test is moved to Monday. All should have turned in their lab notebooks unless they have an extension on their Alkali Carbonate Lab.
Today we worked on the calculations for Redox Titration lab. The goal was to finish by end of class.
Today we started with using table of standard reduction potentials to determine if a reaction will happen. We did practice problems in the packet. Noticed the positive slope pattern that made it much easier! Not for next year that the worksheet has an error on it (charge on S2O8 should be -2 and answers should say it is being reduced, not oxidized!). We talked about how to predict stronger/weaker oxidizing/reducing agents and how to choose a good oxidizing agent for a redox titration.
HW: Study for Redox Quiz