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Worksheet 47: Redox reaction equations . Topic 11

Set A: Determining Redox equations Objective: To test your ability to determine if equation
represents a redox or a non-redox reaction

Next to the equations: Write “redox” next to those that represent redox reaction
Write “Not a redox” next to those that DO NOT represent redox reactions.

1. Ni + Sn ------------- > Ni + Sn 2+ ____________________________
2+
4+

2. H2O (g) --------------- > H2O (s) ____________________________

3. KOH + HNO3 ----------- > KNO3 + H2O ____________________________

Teacher Preview Copy
Teacher Preview Copy

4. Mg + 2H2O ------------- > Mg(OH)2 + H2 _____________________________________________

5. Sn + 2HCl -------------- > SnCl2 + H2 _____________________________________________

+
-
6. K + Cl ---------------- > KCl _____________________________ Need Help? Study Book Pg 265 Set 6 – 7

7. 2KClO3 ---------------- > 2KCl + 3O2 ______-________________________________________

8. 2Mg + O2 ------------- > 2MgO _____________________________

9. 2NaNO3 + Li2SO4 ------- > Na2SO4 + 2LiNO3 _____________________________________________

-
+
10. NH4Cl ------------------- > NH4 + Cl _____________________________

Set B: Change in oxidation numbers Objective: To test your ability to determine if an oxidation

number change represents oxidation or reduction.

Oxidation number changes are given below.
Indicate in the spaces if the change represents “oxidation” or “reduction.”
11. 0 ------------ > +1 __________________
Answer questions below based on the
changes given in # 11 – 16.
12. +1 ---------- > -2 ___________________ Write only the question number in the blanks.

17. Which of the changes represents the
13. -3 ----------- > -1 ___________________ greatest number of electrons lost? ________
18. Which of the changes represents the
least number of electrons lost? _______ Study Book Pg 268 Set 12
14. -2 ---------- > +2 ___________________ 19. Which of the changes represents the
greatest number of electrons gained? _____
15. +3 ---------- > +1 ___________________ 20. Which of the changes represents the

least number of electrons gained? ______
16. +1 ---------- > 0 __________________

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