QR Challenge: Chemistry 2 Honors Midterm Review 2020

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. How many significant figures are in 4.3 x 10^16?	2
2. Using the rules for significant figures, if an object has a mass of 18 g and a volume of 4.56 mL, what is its density?	3.9 g/mL
3. What is the number 0.00563 in scientific notation?	5.63 x 10^-3
4. How many liters are in 63 mL?	0.063 L
5. How many kilograms are in 450,000 mg?	0.45 kg
6. What is 63.5 degrees Celsius in Kelvin?	336.5 K
7. What is the formula for the compound Gold (I) Carbonate?	Au2CO3
8. What is the name of the ionic compound AgBr?	Silver Bromide
9. What is the formula for the compound Calcium Hydroxide?	Ca(OH)2
10. Name the covalent compound N3O7.	Trinitrogen Heptoxide
11. How many protons are in the isotope Sulfur-37?	16
12. How many electrons are in a chlorine ion with a -1 charge?	18
13. What is the mass number of an atom with 14 protons, 14 electrons and 15 neutrons?	29
14. Are cations or anions smaller?	cations
15. What charge to cations have, positive or negative?	positive
16. How many moles are in 34.5 g of Calcium Chloride?	0.311 moles
17. What is the percent composition of Magnesium in magnesium sulfate?	20.2%
18. A compound has the empirical formula of C2H4, what is its molecular formula if the molecular mass is 84.2?	C6H12
19. A theoretical yield is calculated to be 34.6 g, but a chemist actually produces 31.5 g in the lab. What is the percent yield?	91.0%4
20. Which of the following elements has the largest ionization energy: Vanadium, Titanium, Scandium, or Calcium?	Vanadium
21. Which of the following ions has the smallest atomic radius: O^2-, F^-, Ne, or Na^+?	Na^+
22. What is the correct electron configuration for the ion Fe^3+?	d. 1s22s22p63s23p64s03d4

 

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