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QR Challenge: Acids and Bases

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

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 an Arrhenius acid?produces H+ in solution
2. 2. What is a Bronsted-Lowry acid?H+ donor
3. 3. What is a Bronsted-Lowry base?H+ acceptor
4. 4. What is an Arrhenius base?produces OH- in solution
5. 5. pH + pOH = ??14
6. 6. Name the strong acids.seven acids
7. 7. Name the strong bases.eight bases
8. 8. Draw the pH scale including the range of acid, base, and neutral.pH scale
9. 9. What is the pH of 0.00056M HBr?3.25
10. 10. What is the pH of 0.005M NaOH?12.7
11. 11. What is the pH of 0.00034M H2SO4?3.2
12. 12. What is the pH of 0.03M Ca(OH)2?12.8
13. 13. What is the pOH of 0.009M LiOH?2.05
14. 14. What is the pH of 0.00000067M HNO3?6.2
15. 15. Explain what an indicator does.Changes color based on pH
16. 16. What is neutral pH?7
17. 17. What is the pH of an acid?less than 7
18. 18. What is the pH of a base?more than 7

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=1.-What-is-an-Arrhenius-acid?

Question 1 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=2.-What-is-a-Bronsted-Lowry-acid?

Question 2 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=3.-What-is-a-Bronsted-Lowry-base?

Question 3 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=4.-What-is-an-Arrhenius-base?

Question 4 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=5.-pH-+-pOH-=-??

Question 5 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=6.-Name-the-strong-acids.

Question 6 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=7.-Name-the-strong-bases.

Question 7 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=8.-Draw-the-pH-scale-including-the-range-of-acid,-base,-and-neutral.

Question 8 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=9.-What-is-the-pH-of-0.00056M-HBr?

Question 9 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=10.-What-is-the-pH-of-0.005M-NaOH?

Question 10 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=11.-What-is-the-pH-of-0.00034M-H2SO4?

Question 11 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=12.-What-is-the-pH-of-0.03M-Ca(OH)2?

Question 12 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=13.-What-is-the-pOH-of-0.009M-LiOH?

Question 13 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=14.-What-is-the-pH-of-0.00000067M-HNO3?

Question 14 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=15.-Explain-what-an-indicator-does.

Question 15 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=16.-What-is-neutral-pH?

Question 16 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=17.-What-is-the-pH-of-an-acid?

Question 17 (of 18)

 



Acids and Bases: QR Challenge

https://www.classtools.net/QR/decode.php?text=18.-What-is-the-pH-of-a-base?

Question 18 (of 18)