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QR Challenge: Chemical Formulas, Equations, and Conservation of Mass Review

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. What is the number written in front of a chemical formula called?coefficient
2. Define the law of conservation of matter.Atoms are neither created nor destroyed in a chemical reaction.
3. Identify if this chemical equation is balanced or unbalanced. HCl + CaCO3 -> CaCl2 + H2O + CO2unbalanced
4. In this chemical equation, how many hydrogen atoms are represented in the reactants? 2C2H6 + 7O2 -> 4CO2 + 6H2O 12
5. Does this equation follow the law of conservation of mass?2HCl + CaCO3-> CaCl2 + H2O + CO2yes
6. What are the 5 ways to identify if a chemical reactions has happened?color change, formation of a gas, presence of light, temperature change, formations of a precipitate
7. identify if this equations is Balanced or Unbalanced SiCl4 + H2O -> SiO2 + HClunbalanced
8. Balance the following equation: P + 02 -> P4084P + 4O2 -> P4O8
9. What is found on the right side of a chemical equation?Product
10. How many different types of elements are in C6H12O6?3
11. What are valence electrons?Electrons in the Outer shell
12. Is this equation balanced?C3H8 + 5O2 -> 4H2O + 3CO2
13. Draw and color a model of this chemical formula CO2colored model
14. Define the term precipitate.a white solid that forms and falls to the bottom of a container.
15. Balance the following equation, Ni + AuBr3 → NiBr2 + Aubalance
16. a process in which atoms of one or more substances rearrange to form one or more new substancesChemical Reaction
17. How many atoms are present in this chemical formula?14
18. Is this chemical formula balanced?2As + NaOH  2Na3AsO3 +3H2

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

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

Question 1 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

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

Question 2 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Identify_if_this_chemical_equation_is_balanced_or_unbalanced._HCl_+_CaCO3_->_CaCl2_+_H2O_+_CO2

Question 3 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=In_this_chemical_equation,_how_many_hydrogen_atoms_are_represented_in_the_reactants?_2C2H6_+_7O2_->_4CO2_+_6H2O

Question 4 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Does_this_equation_follow_the_law_of_conservation_of_mass?2HCl_+_CaCO3->_CaCl2_+_H2O_+_CO2

Question 5 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_are_the_5_ways_to_identify_if_a_chemical_reactions_has_happened?

Question 6 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=identify_if_this_equations_is_Balanced_or_Unbalanced_SiCl4_+_H2O_->_SiO2_+_HCl

Question 7 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Balance_the_following_equation:__P_+_02_->_P408

Question 8 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

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

Question 9 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=How_many_different_types_of_elements_are_in_C6H12O6?

Question 10 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

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

Question 11 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

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

Question 12 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Draw_and_color_a_model_of_this_chemical_formula_CO2

Question 13 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

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

Question 14 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Balance_the_following_equation,_Ni_+_AuBr3_→_NiBr2_+_Au

Question 15 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

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

Question 16 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

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

Question 17 (of 18)

 


Chemical Formulas, Equations, and Conservation of Mass Review: QR Challenge

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

Question 18 (of 18)