1. Titration Lab Practice and Calculations

2. Evaluation/Assessment:
Objective:
Today I will be able to:
Use correct lab technique to titrate an acid
Calculate the concentration of an unknown acid using titration
Evaluation/Assessment:
Informal assessment: Monitoring student performance as they complete the titration lab and calculations
Formal assessment: analyzing students titration lab calculations and exit ticket
Common Core Connection
Value Evidence
Use appropriate tools strategically
Attend to precision

3. Lesson Sequence Evaluate: Warm – Up
Engage and Explore: Titration Lab Practice
Explain: Titration Calculations
Elaborate: Titration Lab Practice with Calculations
Evaluate: Exit Ticket

4. Warm - Up What does it mean to be a conjugate base?
Predict the products and identify the acid, base, conjugate acid, and conjugate base:
HSO4-(aq) + CO32-(aq)  SO42-(aq) + HCO3-(aq)

5. Objective Today I will be able to:
Use correct lab technique to titrate an acid
Calculate the concentration of an unknown acid using titration

6. Homework
Tonight’s HW: Conjugate Acid Base WS

7. Agenda Warm – Up Conjugate Acids & Bases Titration Lab Practice
Titration Lab Practice with Calculations
Exit Ticket

8. Titration Lab Technique

9. Titration Lab Technique
Work in the lab with a partner
At most you have 3 trials to complete
You pick your best one!
Must wear goggles, aprons and closed toe shoes
Take 5 ml of HCl
Titrate it with NaOH
Show Mr. Klotz your titrated sample
EVERY sample even if you want to do more
Dispose of titrated HCl/ NaOH in the sink with excess water
Do not refill the buret. Call Mr. Klotz over if you need more NaOH
Pass out worksheets and have them cross out the backside

10. REMEMBER! This is what your solution should look like

11. Titration Lab with Calculations

12. Titration Lab with Calculations
Use the the technique you practiced yesterday
Record the data for the quantity of NaOH used and the concentration to help you determine the unknown concentraton of HCl
Calculate your percent error
Repeat if you got a high % error or you over titrate

13. Exit Ticket Reflection:
What will I do to be successful in the titration lab practical next class?