QR Challenge: Chem Fnal Review
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. The mass of 2 moles of oxygen atoms is | 32.00 g
|
2. The lowest whole-number ratio of elements in a compound is called the | empirical formula
| 3. Calculate the molecular formula for a compound is N2O4 what is the empirical formula? | N2O
| 4. The coefficients in a chemical equation represent the | relative numbers of moles of reactants and products
| 5. Carbon in Oxygen is an example of which solute-solvent combination? | gas-gas
| 6. To conduct electricity, a solution must contain | ions
| 7. Which of the following is likely to produce crystals if disturbed? a supersaturated solution or a concentrated solution | super
| 8. In the expression like dissolves like, the word like refers to similarity in molecular | polarity
| 9. As temperature increases, solubility of solids in liquids | increases
| 10. Which of the following is phosphoric acid HPO4 orH3PO4? | H3PO4
| 11. Hydroxides are bases or acids. | bases
| 12. The pH scale in general use ranges from | 0 to 14
| 13. An electron-pair acceptor is a | Bronsted-Lowry base
| 14. A water solution whose pH is 11 is always | basic
| 15. What is the hydrogen ion concentration of a solution whose pH is 11.7? | 1.9 X 10-12 M
| 16. In the reaction CH3COOH + H2O → H3O+ + CH3COO -, the conjugate base of CH3COOH is | CH3COO-
| 17. Convert the pressure 0.970 atm to mm Hg. | 737 mm Hg
| 18. The combining of two nuclei to form one nucleus with a larger mass is called a ____________. | Fusion
| 19. Which way will heat flow? | hot to cold |
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=The_mass_of_2_moles_of_oxygen_atoms_is
Question 1 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=The_lowest_whole-number_ratio_of_elements_in_a_compound_is_called_the
Question 2 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Calculate_the_molecular_formula_for_a_compound_is_N2O4_what_is_the_empirical_formula?
Question 3 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=The_coefficients_in_a_chemical_equation_represent_the
Question 4 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Carbon_in_Oxygen_is_an_example_of_which_solute-solvent_combination?
Question 5 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=To_conduct_electricity,_a_solution_must_contain
Question 6 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Which_of_the_following_is_likely_to_produce_crystals_if_disturbed?_a_supersaturated_solution_or_a_concentrated_solution
Question 7 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=In_the_expression_like_dissolves_like,_the_word_like_refers_to_similarity_in_molecular
Question 8 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=As_temperature_increases,_solubility_of_solids_in_liquids
Question 9 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Which_of_the_following_is_phosphoric_acid_HPO4 orH3PO4?
Question 10 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Hydroxides_are__bases_or_acids.
Question 11 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=The_pH_scale_in_general_use_ranges_from
Question 12 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=An_electron-pair_acceptor_is_a
Question 13 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=A_water_solution_whose_pH_is_11_is_always
Question 14 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=What_is_the_hydrogen_ion_concentration_of_a_solution_whose_pH_is_11.7?
Question 15 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=In_the_reaction_CH3COOH__+__H2O__→__H3O+__+__CH3COO_-,_the_conjugate_base_of_CH3COOH_is
Question 16 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Convert_the_pressure_0.970_atm_to_mm_Hg.
Question 17 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=The_combining_of_two_nuclei_to_form_one_nucleus_with_a_larger_mass_is_called_a_____________.
Question 18 (of 19)
Chem Fnal Review: QR Challenge
https://www.classtools.net/QR/decode.php?text=Which_way_will_heat_flow?
Question 19 (of 19)
