1. Dilutions Mini-Lab

2. Evaluation/Assessment:
Objective:
Today I will be able to:
Dilute a stock solution to the correct molarity
Calculate the molarity for each component in a solution.
Evaluation/Assessment:
Informal assessment – monitoring student progress as they complete the practice worksheets and the dilutions lab
Analyzing student responses to the practice, lab and exit ticket
Common Core Connection
Make sense of problem and persevere in solving them
Attend to precision
Look for and express regularity in repeated reasoning

3. Lesson Sequence Evaluate: Warm – Up Engage: Solutions Demo
Engage, Explore and Elaborate: Dilutions Mini-Lab
Elaborate: Molarity, Molality, Mole Fraction Practice
Evaluate: Exit Ticket

4. Warm - Up
When dissolving a solute in a solvent, how could you maximize the quantity of solute dissolved?

5. Objective Today I will be able to:
Dilute a stock solution to the correct molarity
Calculate the molarity for each component in a solution.

6. Homework
Finish Practice Problems

7. Agenda Warm-Up Dilutions Demo Dilutions Mini-Lab
Molarity, Molality, Mole Fraction Practice
Exit Ticket

8. Watch Ms. Ose’s technique for preparing and diluting a solution
Dilutions Demo
Watch Ms. Ose’s technique for preparing and diluting a solution

9. Review: What technique is used to prepare a solution?
Dilutions Mini-Lab
Purpose: To practice technique for preparing a stock solution and then diluting it
Review: What technique is used to prepare a solution?

10. Lab Safety Ms.Ose will choose the lab groups today
Goggles, aprons and closed toe shoes must be worn to participate in the laboratory
All materials can be disposed of down the sink

11. Lab Directions Part 1 Part 2 Be sure to only used distilled water
Prepare a 0.30 M sucrose solution in the larger volumetric flask at your lab station
Perform the calculations for your stock solution and dilution before beginning the lab. Ms. Ose must sign off on the calculation before you begin using chemicals
Part 2
Dilute your stock solution to the molarity on the index card provided by Ms. Ose in the smaller volumetric flask
Be sure to only used distilled water
Follow the directions on the worksheet as modeled by Ms. Ose’s demo

12. Molarity/Dilutions Practice
When you complete the lab activity, turn it in to Ms. Ose and begin working on the Molarity/Molality practice. Whatever is not completed in class will become your homework.

13. Exit Ticket
Which molarity would be able to transmit the most light? What molarity would be able to transmit the least light? Explain.