1. Silver Nitrate Lab – Day 3 Limiting Reactants

2. Evaluation/Assessment:
Objective:
Today I will be able to:
Calculate the mass of silver produced when reacting copper with silver nitrate
Apply stoichiometric ratios to finding the mass of reactants and products
Determine the limiting and excess reactants in a chemical reaction
Evaluation/Assessment:
Informal Assessment – Monitoring student interactions as they complete the practice and the lab
Formal Assessment – Analyzing student responses to the lab and the limiting reactant practice
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 Elaborate: Review Excess Reactants
Explain: Silver Nitrate Lab Safety
Engage and Explore: Silver Nitrate Lab
Elaborate: Limiting Reactant Practice
Evaluate: Exit Ticket

4. Warm - Up Answer the question below for the following reaction:
Mg(s) + 2HCl (aq)  MgCl2 (aq) + H2 (g)
0.500 grams of Mg is reacted with 10.0 g of HCl to produce 1.95 grams of MgCl2. Mg is the limiting reactant and HCl is the excess reactant.
What problem solving strategy would you use to determine how much HCl is in excess?

5. Solve the Problem!
Answer the question below for the following reaction:
Mg(s) + 2HCl (aq)  MgCl2 (aq) + H2 (g)
0.500 grams of Mg is reacted with 10.0 g of HCl to produce 1.95 grams of MgCl2. Mg is the limiting reactant and HCl is the excess reactant.
How much HCl is in excess?

6. Objective Today I will be able to:
Calculate the mass of silver produced when reacting copper with silver nitrate
Apply stoichiometric ratios to finding the mass of reactants and products
Determine the limiting and excess reactants in a chemical reaction

7. Homework Work on Mole Project Due March 11
Finish Limiting Reactant Practice

8. Agenda Warm-Up Excess Reactant Problem Silver Nitrate Lab Safety
Day 3: Silver Nitrate Lab
Limiting Reactant Practice
Exit Ticket

9. Silver Nitrate Lab Day 3

10. Day 3 Day 3 – Today we are finding the mass of silver produced
Have one lab group member measure the mass of the silver
Then complete the calculations
Write the mass of silver and percent error for your group on the board once you complete the calculations

11. Limiting Reactant Practice
After completing the filtration, complete the limiting reactant practice at your desk. Problems not completed in class will become your homework

12. Exit Ticket
The current price for silver is 0.68 cents per gram. How much money can we reclaim for the silver we produced?
Look at the percent errors for the lab? What could have caused the errors we are seeing in the data?