<p> Zuehlke Chemistry 3/20 to 3/24/17 GPS Standards – SCSh1-7, SC2 c Zuehlke Chemistry 3/20 to 3/24/17 Monday – many students out – make sure I pair them with students Progress who were in class today and on Friday for lab. Materials 1st – </p><p>Content & Methods 2nd – Introduction to hydrates Pre-lab – Ch. 10.5 – Formulas of a Hydrate (Hydrates are special versions 3rd – of empirical formulas – do this first, then come back to Ch. 10.4 empirical formulas) 4th – Assign lab partners – students write their own procedures for the lab (the lab handout provides guidelines for determining what data to collect.) 5th – </p><p>Evaluation – observation of lab, lab report, homework </p><p>Tuesday Progress Materials copper(II) sulfate, hot-plates, crucibles, stirring rods, tongs, balances 1st – </p><p>Content & Methods 2nd – </p><p> WU – review how to weight out desired amounts of chemical 3rd –  Have students use varying amounts of copper(II) sulfate (1.5 to 3 g).  Students collect data using the procedures they wrote yesterday. 4th – </p><p>Evaluation – observation of lab, lab report, homework 5th – HW for Ch. 10  Due 3/23 Ch. 10.5 Hydrates: Read Ch. 10.5 p. 351-354, p. 353 #74, 75, 77, 81 p. 361-3 #181, 185-187, p. 364-5 #9, 10, 14, p. 555 #116  Due 3.24 – Hydrate lab report (purpose, hypotheses with citation, procedures, data including graph, analysis (Analysis questions are on the front of the handout – students tend to forget to do these.)  Due 3/27 Ch. 10.4 Empirical & Molecular Formulas: Read Ch. 10.4 p. 341-350, p. 346 #60 p. 350 #62, p. 360-1 #167, 184, 196, 197  Due 3/28 Ch. 10.4 % Composition: Read Ch. 10.4 p. 341-350, p. 344-6 #54, p. 360-3 #162, 169, 180, p. 555 #114-115 Wednesday Progress Materials Content & Methods 1st – </p><p>Students will probably need more practice solving hydrate problems before 2nd – completing the lab analysis. Having done the experiment gives them a better sense of what hydrates are. Now they work on the conceptual 3rd – understanding before finishing the lab on Thursday 3/23. 4th – Evaluation - class participation, lab report, quiz – date TBA 5th –  (Teaching note – Observe students and assess potential quality of data. The lab is more valuable if students compile class data construct a graph of moles water evaporated vs moles anhydrous copper(II) sulfate in their samples and then to determine the slope of</p><p> the line. The slope = x in CuSO4xH2O. Consider combining data from all 5 classes? Zuehlke Chemistry 3/20 to 3/24/17 Better outcome?  Data quality is frequently too poor to draw a reasonable graph and determine the slope (data frequently looks like a scatter plot). Some students drew a regression line on their calculators and I used Excel. We then discussed reasons that x could be too high or too low. Evaluation - lab report, homework </p><p>Thursday Materials </p><p>Content & Methods </p><p> Students finish working on analysis for hydrates lab. – See Wednesday’s teaching note regarding lab data. Evaluation - lab report, homework </p><p>Friday Content & Methods Introduction to empirical and molecular formulas – relate to determining formulas of hydrates (convert mass to moles, find mole ratios. To find molecular formulas, determine how many times the empirical formula is repeated in the molecule.)</p><p>Discuss the meaning of the word “empirical” – use hanging a picture example Evaluation - class participation, homework </p>