Molar Volume of a Gas Lab

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

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

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

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

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

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

Molar Volume of a Gas Lab

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

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

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?