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QR Challenge: QUIZ ACID AND BASES

Created using the ClassTools QR Treasure Hunt Generator

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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

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. 1. It is a substance when dissolved in water, increases the concentrations of hydronium ion, H3O+(aq). answer1 Acid
2. 2. It is a substance that, when dissolved in water, increases the concentration of hydroxide ions, OH-(aq). answer2 Base
3. 3. It is the species donating a proton. answer3 Acid
4. 4. It is the species accepting the proton. answer4 Base
5. 5. It consists of two species in an acid-base reaction that differ by the loss or gain of proton.answer5 conjugate acid-base pair
6. . answer6 6
7. 6. For the following reaction, label each species as an acid or a base. Indicate the species that are conjugates of one another. H2SO^4- + HCO3- ⇄ HPO^4 2- + H2CO3 answer6 123
8. 7. For the following reactions, label each species as an acid or a base. Indicate the species that are conjugates of one another. HSO^4- + H2O ⇄ SO4^2- + H3O+ answer7 1123
9. 8. Obtain the pH corresponding to the following hydronium ion concentration: 1.0 x 10-6 M answer8 6
10. 9. Obtain the pH corresponding to the following hydronium ion concentration: 5.0 x 10 -11 M answer9 10
11. 10. What is the neutral pH level of a substance? answer10 7

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=1._It_is_a_substance_when_dissolved_in_water,_increases_the_concentrations_of_hydronium_ion,_H3O+(aq).

Question 1 (of 11)

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=2._It_is_a_substance_that,_when_dissolved_in_water,_increases_the_concentration_of_hydroxide_ions,_OH-(aq).

Question 2 (of 11)

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=3._It_is_the_species_donating_a_proton.

Question 3 (of 11)

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=4._It_is_the_species_accepting_the_proton.

Question 4 (of 11)

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=5._It_consists_of_two_species_in_an_acid-base_reaction_that_differ_by_the_loss_or_gain_of_proton.

Question 5 (of 11)

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=.

Question 6 (of 11)

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=6._For_the_following_reaction,_label_each_species_as_an_acid_or_a_base._Indicate_the_species_that_are_conjugates_of_one_another._H2SO^4-_+_HCO3-_⇄_HPO^4_2-_+_H2CO3

Question 7 (of 11)

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=7._For_the_following_reactions,_label_each_species_as_an_acid_or_a_base._Indicate_the_species_that_are_conjugates_of_one_another._HSO^4-_+_H2O_⇄_SO4^2-_+_H3O+

Question 8 (of 11)

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=8._Obtain_the_pH_corresponding_to_the_following_hydronium_ion_concentration:_1.0_x_10-6_M

Question 9 (of 11)

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=9._Obtain_the_pH_corresponding_to_the_following_hydronium_ion_concentration:_5.0_x_10_-11_M

Question 10 (of 11)

 


QUIZ ACID AND BASES: QR Challenge

https://www.classtools.net/QR/decode.php?text=10._What_is_the_neutral_pH_level_of_a_substance?

Question 11 (of 11)