QR Challenge: Ms. Chee Wah Physical Science Chemistry

Created using the ClassTools QR Treasure Hunt Generator

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

• Download a QR reader (e.g. I-Nigma | NeoReader | Kaywa) onto their mobile devices
• Bring these devices into the lesson.

3. Print out the QR codes.

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

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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!

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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.

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Questions / Answers (teacher reference)

Question	Answer
1. 1. How many atoms of carbon (C) are in C6H12O6?	6
2. 2. Which of the following shows the correct way to balance the chemical equation? Fe + O2 -> Fe2O3	2 Fe + 3O2 -> Fe2O6
3. 3.Balance this equation: HgO --> Hg + O2	2HgO --> Hg + O2
4. Mg + __HCl ---> MgCl2 + H2	2
5. 5. Balance this equation._CF4 + _Br2 -- _CBr4 + _F2	1,2,1,2
6. 6. Balance this equation _Al +_HCl --> _H2 +_AlCl3	2, 6, 3, 2
7. 7. What is the formula for Lithium fluoride?	LiF
8. 8. What is the formula for Beryllium sulfide?	BeS
9. 9. Name the compound BBr3?	boron tribromide
10. 10. Name the compound AlF3.	Aluminum fluoride
11. 11. Name the compound N2O3.	dinitrogen trioxide
12. 12. What is the formula for Tetraphosphorous Pentachloride?	P4Cl5
13. 13. Name the compound CP.	carbon monophosphide
14. 14. What type of chemical reaction is: 4Si + S8 --> 2Si2S4?	synthesis
15. 15. What type of chemical reaction is: 3Ca + 2AlCl3 --> 3CaCl2 + 2Al?	single displacement
16. 16. What type of chemical reaction is: 3KOH + H3PO4 --> K3PO4 + 3H2O?	double displacement
17. 17. What type of chemical reaction is: 2NO2 --> N2 + 2O2	decomposition
18. 18. Which chemical reaction breaks down into 2 substances?	decomposition
19. 19. A + B = AB	synthesis
20. 20. Which chemical reaction switches 2 elements?	double replacement
21. 21. A + BC = B + AC	single displacement
22. 22. What kind of bond forms when an atom give away an electron?	ionic bond
23. 23. When a nonmetal gains electrons, it becomes this type of ion?	anion
24. 24. All elements in group 1 have what type of ion?	1+
25. 25.What kind of bond forms when atoms share electrons?	covalent bond

 

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