QR Challenge: Chemistry Unit 7: Acids & Bases
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.
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. Bronsted-Lowry ACIDS ___________ a hydrogen atom | lose
|
2. If an unknown solution turns red litmus paper to blue, you know that it is... | a base
| 3. What is the conjugate acid for the base, SO4? | HSO4
| 4. What are the products in a neutralization reaction? | salt & water
| 5. Which of the following is the Arrhenius acid: HNO3 or KOH? | HNO3
| 6. A solution with a pH of 8 is... | basic
| 7. How does an electrolyte conduct a current? | a compound dissociates into ions to allow charged to flow
| 8. If an unknown solution keeps blue litmus paper blue AND keeps red litmus paper red, you know that it is... | neutral
| 9. If an unknown solution turns blue litmus paper to red, you know that it is... | an acid
| 10. What is the conjugate base for the acid, HCO3? | CO3
| 11. What are the reactants in a neutralization reaction? | an acid & a base
| 12. A solution with a pH of 2 is... | acidic
| 13. Can a saturated solution hold anymore solute without being heated up? | no
| 14. Bronsted-Lowry BASES ___________ a hydrogen atom | gain
| 15. What type of compound is needed to become an electrolyte? | ionic
| 16. A solution with a pH of 7 is... | neutral |
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=Bronsted-Lowry_ACIDS_____________a_hydrogen_atom
Question 1 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=If_an_unknown_solution_turns_red_litmus_paper_to_blue,_you_know_that_it_is...
Question 2 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_is_the_conjugate_acid_for_the_base,_SO4?
Question 3 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_are_the_products_in_a_neutralization_reaction?
Question 4 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=Which_of_the_following_is_the_Arrhenius_acid:_HNO3_or_KOH?
Question 5 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=A_solution_with_a_pH_of_8_is...
Question 6 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=How_does_an_electrolyte_conduct_a_current?
Question 7 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=If_an_unknown_solution_keeps_blue_litmus_paper_blue_AND_keeps_red_litmus_paper_red,_you_know_that_it_is...
Question 8 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=If_an_unknown_solution_turns_blue_litmus_paper_to_red,_you_know_that_it_is...
Question 9 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_is_the_conjugate_base_for_the_acid,_HCO3?
Question 10 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_are_the_reactants_in_a_neutralization_reaction?
Question 11 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=A_solution_with_a_pH_of_2_is...
Question 12 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=Can_a_saturated_solution_hold_anymore_solute_without_being_heated_up?
Question 13 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=Bronsted-Lowry_BASES_____________a_hydrogen_atom
Question 14 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_type_of_compound_is_needed_to_become_an_electrolyte?
Question 15 (of 16)
Chemistry Unit 7: Acids & Bases: QR Challenge
https://www.classtools.net/QR/decode.php?text=A_solution_with_a_pH_of_7_is...
Question 16 (of 16)