QR Challenge: National 5 - Revision

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. Calculate the number of moles present in 0.5g of NaCl	0.09mol
2. Calculate the relative atomic mass of one mole of potassium hydroxide	56
3. Calculate the volume occupied by 0.5 moles of 2mol l-1 hydrochloric acid	0.25L/250cm3
4. Calculate the mass of 1 mole of calcium carbonate	100g
5. Calculate the heat energy produced when the temperature rise of 200cm3 water is 26oC	21.736kJ
6. Calculate the average rate of reaction when 10cm3 of oxygen gas is produced during the first 16seconds of the reaction	0.625cm3/s
7. Calculate the gram formula mass of one mole of ammonium nitrate	80g
8. Calculate the concentration of 150cm3 of 0.2 moles of potassium iodide solution	1.3mol/l
9. Over a period of 30 minutes the temperature rose from 10o to 45o. Calculate the heat energy produced within the 300ml of water	43.89kJ
10. (II) sulfate	319g
11. Calculate the average rate of reaction between 25 minutes and 50 minutes if 4g reactant has been used up	0.16g/min
12. Calculate the mass of NaOH required to make 200cm3 of a 0.1mol l-1 solution	0.005g
13. Calculate the mass of LiCl required to make 0.1L of a 5mol l-1 solution	0.012g
14. During a titration 15cm3 of 0.1mol l-1 hydrochloric acid was used to neutralise 20cm3 of sodium hydroxide. Calculate the concentration of sodium hydroxide	0.075mol/l
15. During a titration 40cm3 of 0.2mol l-1 sodium hydroxide was neutralised by 0.5mol l-1 hydrochloric acid. Calculate the volume required of hydrochloric acid	16cm3

 

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