QR Challenge: Introduction- 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

• 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. This is a substance that produces H+ ions in solution.	ACIDS
2. Vinegar, Citric Fruits, Tomatoes, Tea, battery Acid, and Carbonated Drinks are all examples of	ACIDS
3. This is a substance that produces hydroxide ions (OH-) in solution.	BASES
4. Soap, Shampoo, Window cleaner, Drain cleaner, Antacid, and Bleach are all examples of	BASES
5. When bases are combines with this, they will create water and a salt.	ACIDS
6. This reaction happens when you combine H+ and OH-.	Neutralization Reaction
7. This is a compound that produces ions when it is dissolved in a solvent.	ELECTROLYTES
8. These are great conductors of electricity.	ELECTROLYTES
9. This is a weak acid that is found in soda.	CARBONIC ACID (h^2Co^3)
10. This is a medium weak acid that is found in vinegar.	ACETIC ACID (H^2COOH)
11. This is a medium weak acid that is found in fruits.	CITRIC ACID
12. This is the strong acid found in your stomach.	HYDROCHLORIC ACID (HCL)
13. This is a strong acid found in fertilizer.	NITRIC ACID(HNO^3)
14. This is a strong acid found in batteries.	SULFURIC ACID (H^2SO^4)
15. This is a weak base found in antacids and milk-of-magnesia.	MAGNESIUM HYDROXIDE(MgOH^2)
16. This is a weak base found in limestone.	CALCIUM HYDROXIDE (CaOH^2)
17. This is a strong base found in lye that is used to make soap.	SODIUM HYDROXIDE (NaOH)
18. This is a strong base used to make Dran-O or Liquid Plumber.	POTASSIUM HYDROXIDE(KOH)
19. This is strong base used to make ammonia cleaner.	AMONIA

 

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