Sunday, December 14, 2008

Wednesday, Dec. 10th: Practice with Making Solutions

BIG IDEA: You can calculate the molarity of a solution, and make solutions of a particular molarity!

1. Warm-up: how many grams of Sr(NO3)2 needed to create 100 ml of a 2M Sr(NO3)2 solution?
2. Practice with problems in making different solutions of things we’ve used in the classroom: 3M NaOH, 8M HNO3.
3. Short lab: have each lab group make different concentrations of Kool-Aid: 0.01 M, 0.1 M., 0.25 M., 0.5 M., 0.75 M., 0.9 M., 1 M, and 2 M. Line up the different molarities to see if they were done correctly.

Homework: 1. Make up 3 solutions problems where you provide the molarity (M) and the amount you want to make, and then find the # of grams you need to do it.
2. Quarter Project, complete Trial 2 by next Wednesday.

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