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QR Challenge: Acid Base Practice Test

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. 1When acids react with metals, they produce _____ gas.hydrogen
2. 2.A _____ is produced when a base accepts a hydrogen ion from an acid.congugate acid
3. 3.In the Bronsted-Lowry model of acids and bases, an _____ is a hydrogen donor and a _____ is a hydrogen acceptor.acid,base
4. 4.The weak acid in the following list is _____. a. hydrochoric acide, sulfuric acid c. nitric acid d. acetic acidacetic acid
5. 5.Acids produce_____; they conduct electricity in waterH+
6. 6.The pH scale allows scientists to define the acidity of a substance on a scale of _____0-14
7. 7.In a titration, the ____ is the point at which the indicator changes color and stays that wayendpoint
8. 8.A(n) ____ is a substance that produces OH- ions in a solution.base
9. ____ change color in the presence of an acid or a base.indicator
10. 9.A bitter taste and a slippery feel are clues that a solution is probably a(n) ____base
11. 10.A base that only partly ionizes in a solution is a ____ basewak
12. 11.In a ____ reaction, an acid and a base produce a salt and a water.neutralization
13. 12.Coffee has a pH of about 5. Coffee is ____.acidic
14. 13.What is the pH of blood, given the hydrogen ion concentration is 4.0  10-8 M?7.4
15. 14.HONORS ONLY:What is the ph of 0.45 M of H2SO4?.0045
16. 15.A solution that contains equal concentrations of hydrogen and hydroxide ions is _____.neutral
17. 16.Identify the acid and conjugate base pair in the following equation: HF + H20 --> H30+ + F- conjugate acid H30+, CB= F-
18. 17.HONORS ONLY:Calculate the H concentration of an aqueous solution, given the concentration of OH– is 1 x 10^-5 M and the ion product constant for water, KW is 1 x 10^-14.1 x 10^–9 M
19. 18.HONORS ONLY:Calculate the pOH of a 0.410 M Ba(OH) solution.8.62x10^-2
20. A basic solution contains more ________ ions than hydrogenhydroxide

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=1When-acids-react-with-metals,-they-produce-_____-gas.

Question 1 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=2.A-_____-is-produced-when-a-base-accepts-a-hydrogen-ion-from-an-acid.

Question 2 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=3.In-the-Bronsted-Lowry-model-of-acids-and-bases,-an-_____-is-a-hydrogen-donor-and-a-_____-is-a-hydrogen-acceptor.

Question 3 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=4.The-weak-acid-in-the-following-list-is-_____.-a.-hydrochoric-acide,-sulfuric-acid-c.-nitric-acid-d.-acetic-acid

Question 4 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=5.Acids-produce_____;-they-conduct-electricity-in-water

Question 5 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=6.The-pH-scale-allows-scientists-to-define-the-acidity-of-a-substance-on-a-scale-of-_____

Question 6 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=7.In-a-titration,-the-____-is-the-point-at-which-the-indicator-changes-color-and-stays-that-way

Question 7 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=8.A(n)-____-is-a-substance-that-produces-OH--ions-in-a-solution.

Question 8 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=____-change-color-in-the-presence-of-an-acid-or-a-base.

Question 9 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=9.A-bitter-taste-and-a-slippery-feel-are-clues-that-a-solution-is-probably-a(n)-____

Question 10 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=10.A-base-that-only-partly-ionizes-in-a-solution-is-a-____-base

Question 11 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=11.In-a-____-reaction,-an-acid-and-a-base-produce-a-salt-and-a-water.

Question 12 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=12.Coffee-has-a-pH-of-about-5.-Coffee-is-____.

Question 13 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=13.What-is-the-pH-of-blood,-given-the-hydrogen-ion-concentration-is-4.0--10-8-M?

Question 14 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=14.HONORS-ONLY:What-is-the-ph-of-0.45-M-of-H2SO4?

Question 15 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=15.A-solution-that-contains-equal-concentrations-of-hydrogen-and-hydroxide-ions-is-_____.

Question 16 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=16.Identify-the-acid-and-conjugate-base-pair-in-the-following-equation:-HF-+-H20--->-H30+-+-F-

Question 17 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=17.HONORS-ONLY:Calculate-the-H--concentration-of-an-aqueous-solution,-given-the-concentration-of-OH–-is-1-x-10^-5-M-and-the-ion-product-constant-for-water,-KW-is-1-x-10^-14.

Question 18 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=18.HONORS-ONLY:Calculate-the-pOH-of-a-0.410-M-Ba(OH)-solution.

Question 19 (of 20)

 


Acid Base Practice Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=A-basic-solution-contains-more-________-ions-than-hydrogen

Question 20 (of 20)