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QR Challenge: Balancing Chemical Equations

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. __ SnO2 + __ H2 → __ Sn + __ H2O1 SnO2 + 2 H2 → 1 Sn + 2 H2O
2. __ KOH + __ H3PO4 → __ K3PO4 + __ H2O3 KOH + 1 H3PO4 → 1 K3PO4 + 3 H2O
3. __ KNO3 + __ H2CO3 → __ K2CO3 + __ HNO32 KNO3 + 1 H2CO3 → 1 K2CO3 + 2 HNO3
4. __ Na3PO4 + __ HCl → __ NaCl + __ H3PO41 Na3PO4 + 3 HCl → 3 NaCl + 1 H3PO4
5. __ TiCl4 + __ H2O → __ TiO2 + __ HCl1 TiCl4 + 2 H2O + 1 TiO2 + 4 HCl
6. __ C2H6O + __ O2 → __ CO2 + __ H2O1 C2H6O + 3 O2 → 2 CO2 + 3 H2O
7. __ Fe + __ HC2H3O2 → __ Fe(C2H3O2)3 + __ H22 Fe + 6 HC2H3O2 → 2 Fe(C2H3O2)3 + 3 H2
8. __ NH3 + __ O2 → __ NO + __ H2O4 NH3 + 5 O2 → 4 NO + 6 H2O
9. __ B2Br6 + __ HNO3 → __ B(NO3)3 + __ HBr1 B2Br6 + 6 HNO3 → 2 B(NO3)3 + 6 HBr
10. __ NH4OH + __ KAl(SO4)2·12H2O → __ Al(OH)3 + __ (NH4)2SO4 + __ KOH + __ H2O4 NH4OH + 1 KAl(SO4)2·12H2O → 1 Al(OH)3 + 2 (NH4)2SO4 + 1 KOH + 12 H2O

 


Balancing Chemical Equations: QR Challenge

https://www.classtools.net/QR/decode.php?text=___SnO2_+____H2_→____Sn_+____H2O

Question 1 (of 10)

 


Balancing Chemical Equations: QR Challenge

https://www.classtools.net/QR/decode.php?text=___KOH_+____H3PO4_→____K3PO4_+____H2O

Question 2 (of 10)

 


Balancing Chemical Equations: QR Challenge

https://www.classtools.net/QR/decode.php?text=___KNO3_+____H2CO3_→____K2CO3_+____HNO3

Question 3 (of 10)

 


Balancing Chemical Equations: QR Challenge

https://www.classtools.net/QR/decode.php?text=___Na3PO4_+____HCl_→____NaCl_+____H3PO4

Question 4 (of 10)

 


Balancing Chemical Equations: QR Challenge

https://www.classtools.net/QR/decode.php?text=___TiCl4_+____H2O_→____TiO2_+____HCl

Question 5 (of 10)

 


Balancing Chemical Equations: QR Challenge

https://www.classtools.net/QR/decode.php?text=___C2H6O_+____O2_→____CO2_+____H2O

Question 6 (of 10)

 


Balancing Chemical Equations: QR Challenge

https://www.classtools.net/QR/decode.php?text=___Fe_+____HC2H3O2_→____Fe(C2H3O2)3_+____H2

Question 7 (of 10)

 


Balancing Chemical Equations: QR Challenge

https://www.classtools.net/QR/decode.php?text=___NH3_+____O2_→____NO_+____H2O

Question 8 (of 10)

 


Balancing Chemical Equations: QR Challenge

https://www.classtools.net/QR/decode.php?text=___B2Br6_+____HNO3_→____B(NO3)3_+____HBr

Question 9 (of 10)

 


Balancing Chemical Equations: QR Challenge

https://www.classtools.net/QR/decode.php?text=___NH4OH_+____KAl(SO4)2·12H2O_→____Al(OH)3_+____(NH4)2SO4_+____KOH_+____H2O

Question 10 (of 10)