1. Molarity and Dilution Calculations

2.  Objective:  Today I will be able to:  Calculate the molarity of a solution  Calculate dilutions from a stock solution  Evaluation/Assessment:  Informal Assessment – monitoring student questions during the whiteboard practice problems and the dilutions practice  Formal Assessment – analyzing student responses to the exit ticket and dilution problems  Common Core Connection  Make sense of problem and persevere in solving them  Model with mathematics  Look for and express regularity in repeated reasoning

3. Lesson Sequence  Evaluate: Warm – Up  Evaluate: Review HW  Engage and Elaborate: Whiteboard Molarity Problems  Explain: Dilution  Elaborate: Dilution Practice problems  Evaluate: Exit Ticket

4. Warm - Up  What is molarity?  What is the formula for molarity?  What do each of the symbols represent?  How are grams converted to moles?

5. Objective  Today I will be able to:  Calculate the molarity of a solution  Calculate dilutions from a stock solution

6. Homework  Finish Dilution Practice Problems

7. Agenda  Warm-Up  Review HW  Molarity Whiteboard Problems  Dilutions Notes  Dilution Practice Problems  Exit Ticket

8. Review HW What questions do you have about the homework?

9. Molarity Whiteboard Problems

10. Directions  Send 1 person up from your row to get each person a whiteboard, a marker and an eraser  Solve the problem Ms. Ose puts up on the board  Hold up your answer for Ms. Ose to check  Erase!  Repeat

11. Dilutions Notes

12. What is dilution?  Small amount of solute, large amount of solvent  Less concentrated

13. Dilution  In the laboratory we can make a more concentrated solution become more dilute  M 1 V 1 = M 2 V 2  Stock solution – initial solution

14. Dilution Practice Problems Complete the practice problems at your desk. If you have questions ask Ms. Ose. Problems not finished will become your homework.

15. Exit Ticket  How would you prepare 1.5 L a 2.0 M solution from a stock solution of 6.0M HCl?