1. Titration Calculations

2. Common Core Connection
Objectives:
Today I will be able to:
Analyze a titration curve to determine the strength on an acid/base
Calculate the concentration of an unknown acid or base using titration
Informal assessment – monitoring student interactions as they participate in the discussion and complete the calculations
Formal assessment – analyzing student responses to the practice problems and the exit ticket
Common Core Connection
Model with mathematics
Reason abstractly and quantitatively
Make sense of problems and persevere in solving them

3. Lesson Sequence Evaluate: Warm-Up Explain: Titration Curve Analysis
Elaborate: Titration Curve Calculations
Evaluate: Exit Ticket

4. Warm - Up Take out Titration Curve A and B from yesterday
What is meant by using the terminology “strong” acid/base or “weak” acid/base?
Are these terms a synonym for concentration?
The pH of the equivalence point does not have to equal 7. Explain why it can be slightly acidic or basic.

5. Objectives Today I will be able to:
Analyze a titration curve to determine the strength on an acid/base
Calculate the concentration of an unknown acid or base using titration

6. Homework
Finish Titration Calculations

7. Agenda Warm-Up Titration Curve Analysis Discussion
Titration Calculations
Exit Ticket

8. Titration Curve Analysis Discussion
Have out your titration curves so we can discuss what is occurring during the titration

9. Important Things to Remember
ENDPOINT = POINT OF NEUTRALIZATION = EQUIVALENCE POINT
MOLES OF ACID = MOLES OF BASE

10. Titration Curve: Strong Acid with Strong Base
At the equivalence point in an acid–base titration, the acid and base have been brought together in precise stoichiometric proportions.
(Endpoint)
Bromphenol blue, bromthymol blue, and phenolphthalein all change color at very nearly 20.0 mL
At about what volume would we see a color change if we used methyl violet as the indicator?

11. Titration Curve: Weak Acid with Strong Base
The equivalence-point pH is NOT 7.00 here. Why not??
Bromphenol blue was ok for the strong acid/strong base titration, but it changes color far too early to be useful here.

13. Titration Curve A
What acid-base combination is used during this titration?

14. Titration Curve B
What acid-base combination is used during this titration?
Why is the equivalence point higher than 7?

15. Titration of a Diprotic Acid

16. Titration of a PolyProtic Acid

17. Titration Calculations
Complete the calculations at your desk. Problems not solved in class will be completed for homework

18. Exit Ticket
Predict the equations for the titration of H2CO3 with NaOH