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QR Challenge: Unit D: Chemistry Changes

Created using the ClassTools QR Treasure Hunt Generator

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Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

3. Print out the QR codes.

4. Cut them out and place them around your class / school.

B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

Questions / Answers (teacher reference)

Question

Answer

1. 1. What is the Lewis dot structure for Helium? .He.
2. 2. How many total atoms are in the following formula: 3 Al2(OH)3 24
3. 3. What is a property of metallically bonded substances? conductivity
4. 4. What type of bond is formed between atoms in a sugar molecule? covalent
5. 5. What type of bond forms crystalline structures? ionic
6. 6. What is created when Hydrogen loses one electron? H+
7. 7. What is created if Sodium gains one neutron? Na-
8. 8. What form of energy is released or absorbed in most chemical reactions? Heat
9. 9. True or False? Endothermic reactions release heat and feel hot. False
10. 10. What does the law of conservation of mass state? Substances cannot be created nor destroyed
11. 11. Name one way to increase the rate of a reaction. Increase concentration
12. 12. What type of reaction is the following? 2HgO → 2Hg + O2 Decomposition
13. 13. What is the pH of an acid? <7
14. 14. Name an example of a base. Baking soda
15. 15. What color does cabbage juice turn when added to an acid? pink
16. 16. What factor does the pH scale measure? Acidity or number of H+
17. 17. A solution with a very high H+ concentration has a very _________ pH. low
18. 18. Name an example of a pH indicator. cabbage juice
19. 19. Why are antacids taken to relieve upset stomachs? Antacids neutralize stomach acids.
20. 20. True or False? In sugar water, sugar is the solvent and water is the solute. false
21. Bonus Code: Guess what?! Mrs. Schumacher is pregnant! I’m due on July 12. Yay! +3 points

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q1/21:

1. What is the Lewis dot structure for Helium? &choe=UTF-8

Question 1 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q2/21:

2. How many total atoms are in the following formula: 3 Al2(OH)3 &choe=UTF-8

Question 2 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q3/21:

3. What is a property of metallically bonded substances? &choe=UTF-8

Question 3 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q4/21:

4. What type of bond is formed between atoms in a sugar molecule? &choe=UTF-8

Question 4 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q5/21:

5. What type of bond forms crystalline structures? &choe=UTF-8

Question 5 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q6/21:

6. What is created when Hydrogen loses one electron? &choe=UTF-8

Question 6 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q7/21:

7. What is created if Sodium gains one neutron? &choe=UTF-8

Question 7 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q8/21:

8. What form of energy is released or absorbed in most chemical reactions? &choe=UTF-8

Question 8 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q9/21:

9. True or False? Endothermic reactions release heat and feel hot. &choe=UTF-8

Question 9 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q10/21:

10. What does the law of conservation of mass state? &choe=UTF-8

Question 10 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q11/21:

11. Name one way to increase the rate of a reaction. &choe=UTF-8

Question 11 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q12/21:

12. What type of reaction is the following? 2HgO → 2Hg + O2 &choe=UTF-8

Question 12 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q13/21:

13. What is the pH of an acid? &choe=UTF-8

Question 13 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q14/21:

14. Name an example of a base. &choe=UTF-8

Question 14 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q15/21:

15. What color does cabbage juice turn when added to an acid? &choe=UTF-8

Question 15 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q16/21:

16. What factor does the pH scale measure? &choe=UTF-8

Question 16 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q17/21:

17. A solution with a very high H+ concentration has a very _________ pH. &choe=UTF-8

Question 17 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q18/21:

18. Name an example of a pH indicator. &choe=UTF-8

Question 18 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q19/21:

19. Why are antacids taken to relieve upset stomachs? &choe=UTF-8

Question 19 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q20/21:

20. True or False? In sugar water, sugar is the solvent and water is the solute. &choe=UTF-8

Question 20 (of 21)

 


Unit D: Chemistry Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Unit D: Chemistry Changes
Q21/21:

Bonus Code: Guess what?! Mrs. Schumacher is pregnant! I’m due on July 12. Yay! &choe=UTF-8

Question 21 (of 21)