1. Acid/Base Station Review Titration Calculation Notes and Demo

2. Evaluation/Assessment:
Objective:
Today I will be able to:
Define an acid and base using the arrhenius and lewis definitions
Determine the pH of a household substance using indicators
Calculate the pH and pOH of a solution using pH scale calculations
Correctly name acids and bases
Calculate the concentration of an unknown acid by using titration
Evaluation/Assessment:
Informal assessment – student interactions at the stations
Formal assessment – analyzing student responses to the stations and exit ticket
Common Core Connection
Demonstrate Independence
Build Strong Content Knowledge
Make sense of problem and persevere in solving them
Reason abstractly and quantitatively
Use appropriate tools strategically
Attend to precision

3. Lesson Sequence Evaluate: Warm-Up
Elaborate: Acid/Base Station Gallery Walk
Evaluate: Acid/Base Review
Engage and Explore: Titration Demo
Explain: Titration Calculation Notes
Elaborate: Titration Calculation Practice
Evaluate Exit Ticket

4. Warm Up
Name the following acids and bases
HCl
H2SO4
NH3
H2SO3
KOH

5. Objectives Today I will be able to:
Define an acid and base using the arrhenius and lewis definitions
Determine the pH of a household substance using indicators
Calculate the pH and pOH of a solution using pH scale calculations
Correctly name acids and bases
Calculate the concentration of an unknown acid by using titration

6. Homework
Wear Closed Toe Shoes for Lab
B-Day (Thursday)
A-Day (Friday)

7. Agenda Warm-Up Acid/ Base Station Gallery Walk
Acid/Base Station Review
Titration Demo
Titration Calculation Notes
Titration Calculation Practice
Exit Ticket

8. Acid/Base Station Gallery Walk
Travel to each station and check your answers (15 minutes to complete)

9. Acid/Base Review Game
Find a partner. Get 1 whiteboard and 1 marker per partner. Answer the questions on the whiteboard. Each correct answer scores 1 point.

10. Properties of Acids and Bases
Station 1 Questions

11. 1. True or False Bases taste sour False (Acids taste Sour)

12. 2. True or False Acids make blue litmus paper turn red True
Bases also turn red litmus paper blue

13. 3. True or False
Thinking of Acid, Base and Neutral substances… Only acids act as electrolytes and conduct an electrical current
False
Both acids and bases are electrolytes

14. 4. True or False Bases react with metals to form hydrogen gas False
Acids react with metals to form hydrogen gas

15. 5. True or False
Acids and bases neutralize each other when they react. This process destroys the properties of the acid and base.
True

16. Indicators
Station 2 Questions

17. 1. True or False
The indicator phenolphthalein turns pink in a basic solution.
True

18. 2. True or False An indicator usually changes color over a pH range.

19. 3. True or False
All indicators are liquid.
False

20. 4. True or False Some fruits and flowers can be used as indicators.

21. 5. True or False
A universal indicator is a blend of pH indicator solutions designed to identify the pH of a solution over a wide range of values.
True

22. Litmus Paper Testing
Station 3 Questions

23. 1. True or False
Litmus paper that changes from blue to red in a solution indicates that the solution is neutral.
False
Blue to red indicates an acidic solution.

24. 2. True or False
Orange juice is a solution that might change litmus paper from blue to red.
True
Orange juice is acidic.

25. 3. True or False
Blue litmus paper that changes to red shows that the solution has a pH of 3.
False
Litmus paper does not show pH values.

26. 4. True or False
Cleaner with ammonia is a solution that might change litmus paper from blue to red.
False
Cleaner with ammonia is basic. It changes red litmus paper to blue.

27. 5. True or False
Red litmus paper that changes to a wet red color indicates that the solution is basic.
False
Red litmus paper changes to blue in the presence of a base.

28. pH Scale
Station 4 Questions

29. 1. True or False
Bases have higher pH values than acids on the pH scale.
True

30. 2. True or False Hydronium ions can be written as H2O+ False
Hydroniums ions are written as H3O+

31. 3. True or False The equation to determine pH is pH = log[H+] False

32. 4. True or False
pH can be converted into a pOH value by using the equation pH + pOH = 14
True

33. 5. True or False
pH can be written as H+ ions or H3O+ ions.
True

34. Arrhenius vs Bronsted Lowry Acids and Bases
Station 5 Questions

35. 1. True or False
An Arrhenius acid is a substance that when added to water increases the number of OH- ions in the water.
False
Arrhenius acids increase the number of H+ ions in the water.

36. 2. True or False
According to the Bronsted Lowry theory, an acid is a "proton donor" and a base is a "proton acceptor.”
True

37. 3. True or False
NaOH is an example of an Arrhenius base.
True

38. 4. True or False
HF is an Arrhenius acid.
True

39. 5. True or False
NaOH is an example of an Arrhenius, and a Bronsted Lowry, base.
False

40. pH Paper Testing
Station 6 Questions

41. 1. True or False pH paper turns red or blue. False
pH paper can change a variety of colors.

42. 2. True or False
A neutral substance has a pH of 7.
True

43. 3. True or False
An acidic substance can have a pH of 6.
True

44. 4. True or False
A basic substance can have a pH of 5.
False

45. 5. True or False
pH paper dipped into a substance shows results as a color change and a numerical value.
True

46. Acid Naming
Station 7 Questions

47. 1. True or False
If the anion of an acid ends in “ide” you name the acid hydro____ ic acid.
True

48. 2. True or False
If the anion of an acid ends in “ite” you name the acid _______ ic acid.
False
Anions that end in “ate” are named ____ ic acid

49. 3. What is the Acid Name? HF
Hydrofluoric acid

50. 4. What is the Acid Name?
HNO2
Nitrous acid

51. 5. What is the Acid Name?
HC2H3O2
Acetic acid

52. Naming Bases
Station 8 Questions

53. 1. Name this Base
LiOH
Lithium hydroxide

54. 2. Name this Base
KOH
Potassium hydroxide

55. 3. Name this Base
Ca(OH)2
Calcium hydroxide

56. 4. Name this Base
Ba(OH)2
Barium hydroxide

57. 5. Name this Base
NH3
ammonia

58. pH calculation Worksheet
Complete the practice at your desk. Ms. Ose will grade the assignment for accuracy

59. Titration Notes/Demo/Curves

60. Titration is a neutralization reaction
Products are salts and water
Salt produced can be slightly acidic, slightly basic or neutral (Depends on acid strength)

61. Goal of Titration
Procedure use to determine the concentration of an unknown acid or base
Standard solution – solution with the known concentration

62. A solution is titrated until the concentration of acid=base
This is called the Equivalence Point
If an acids and bases are transparent, how can we determine when the concentrations are equal?
Use phenolpthalein as an indicator
Turns fushia in a basic solution
Stop titrating when the solution turns light pink
This is called the endpoint

63. Watch Ms. Ose’s Titration Demo

65. In the perfect world…. Equivalence point = Endpoint
Our endpoint will be a little beyond the equivalence point since we have to see the color change

66. Now we can calculate the concentration of an unknown acid
Ms. Ose will walk you through a guided notes outline to complete the titration calculation. Problems not completed in class will become your homework.

67. Exit Ticket
Write the steps you will take to have a successful titration next class