1. Acids and Bases Lab Packet
Your Name:________________
Mr. Benson’s Class Hour______ 1

2. Acid Rain
Acid Rain is rain with large amounts of acidic material caused by pollution. A pH lower than 6.4.

3. Draw the Demo

4. Explain what happened
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____________________________________ ____________________________________ ____________________________________

5. Introduction/Thinking Questions
What is an acid?
What does it mean to be basic?
How do we measure acids? Bases?
What products are acids? Bases?
How do you determine the strength of acids and bases? 5

6. I. Define the Problem:
___________________________________________________________________________________________ 6

7. II. Focus Question:
_________________________________________________________________________________________________________________________ 7

8. III. Prediction:
I think that blueberry/cabbage (circle one) juice will be the better indicator. I think this because ___________________________________________________________. 8

9. Most people think…… __________cabbage __________blueberry.
IV. Share:
Most people think…… __________cabbage __________blueberry. 9

10. V. Drawing: 10

11. VI. Plan of Action
A. Materials: pH paper, blueberry juice, cabbage juice, several different solutions to test, chem plate, water and paper towels 11

12. B. Independent Variable: ____________________________
VI. Plan of Action
B. Independent Variable: ____________________________ 12

13. C. Dependent Variable: ______________________________
VI. Plan of Action
C. Dependent Variable: ______________________________ 13

14. D. Control: ___________________
VI. Plan of Action
D. Control: ___________________ 14

15. VI. Plan of Action
E. Procedure: 1 2 3 4 5 6 7 15

16. VIII. Data Continued Data Organized in List
Leave the next page for a reorganization of solutions from strongest acid (1) to strongest base (16). Neutrals are in the middle. 16

17. VIII. New Vocabulary
Acid -
Base-
Neutral -
Indicator-
pH -
Ion - 17

18. Make at least 3 claims backed up by evidence from the data.
IX. Claims and Evidence
Make at least 3 claims backed up by evidence from the data. 18

19. X. Conclusion and Reflection
In this investigation….
Explain the lab and why you did it. 19

20. X. Conclusion and Reflection
B. My hypothesis was correct or incorrect because… 20

21. X. Conclusion and Reflection
C. Biases, Errors, Things that did or could have skewed the results
List problems or errors that occurred during the experiment 21

22. X. Conclusion and Reflection
1. Explain, how good of an indicator cabbage juice is? 22

23. X. Conclusion and Reflection
2. Explain, how good of an indicator blueberry juice is? 23

24. X. Conclusion and Reflection
3. Explain how you can use your results to determine the relative strengths of the chemicals tested? 24

25. X. Conclusion and Reflection
4. Explain why it is difficult to test pH with a liquid indicators? 25

26. X. Conclusion and Reflection
5. What good does it do to know whether a substance is an acid or a base (in other words, why is this information useful)? 26

27. X. Conclusion and Reflection
6. What are the characteristics of an Acid? 27

28. X. Conclusion and Reflection
7. What are the characteristics of a Base? 28

29. X. Conclusion and Reflection
8. What color(s) does blueberry juice turn in the presence with an acid? Base? 29

30. X. Conclusion and Reflection
9. What color(s) does cabbage juice turn in the presence with an acid? Base? 30

31. X. Conclusion and Reflection
10. How can you add things to change a solution from an acid to make it a base or vise versa? 31

32. XI.Questions for further thinking
Make at least 3 “I wonder…” or “I am still thinking about…” statements. 32