1. Molar Volume of a Gas Lab

2. Evaluation/Assessment:
Objective:
Today I will be able to:
Calculate the molar volume of a gas by using experimental data
Evaluation/Assessment:
Informal Assessment – Monitoring student questions and interactions as the students complete the lab
Formal Assessment – Analyzing student responses to the lab and the exit ticket
Common Core Connection
Make sense of problem and persevere in solving them
Look for and express regularity in repeated reasoning
Attend to precision
Use appropriate tools strategically

3. Lesson Sequence Evaluate: Warm – Up
Explain: Molar Volume of a Gas Lab Safety
Explore and Elaborate: Molar Volume of a Gas
Elaborate: Molar Volume of a Gas Calculations
Evaluate: Exit Ticket

4. Warm - Up
Take out the ‘Molar Relationship Involving Mass and Volume’ Lab
Read through Procedures #1-13

5. Objective Today I will be able to:
Calculate the molar volume of a gas by using experimental data

6. Homework Finish any data analysis from the lab Gases Exam
Tuesday, April 1st

7. Agenda
Warm – Up
Molar Volume of a Gas Lab
Exit Ticket

8. Molar Volume of a Gas Lab

9. Lab Safety
Goggles, Aprons and Closed Toe shoes must be worn to participate in the lab
CAUTION: 3 Molar HCl
Dispose of liquid down the drain and Magnesium waste in the trash

10. Lab Directions Watch Mr. Klotz’s Demonstration
Tie a piece of magnesium to a string
Place in the gas-measuring tube
Pour 10 ml of HCl into the gas-measuring tube
Rotate clamp and tube to 90 degrees
Fill with water slowly so the HCl is not disrupted
Put the stopper on and let the reaction run
When you finish complete the lab questions and the calculations

11. Wrap-Up What value did you calculate for the molar volume of a gas?
Was it close to the expected value?
What are some sources of error in this lab?