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Worksheet 46 . Topic 11

Set C: Oxidation, reduction, and redox facts. Objective: To test your knowledge of facts related
to oxidation-reduction reactions

Fill in the blanks or answer the following questions on oxidation and reduction.
22. Redox reactions involve the _______________ and _______________ of _____________
occurring _____________________.

23. Which three types of chemical reactions are considered redox?

24. Oxidation is the ___________________ of ___________________ during redox reactions.
25. Reduction is the __________________ of ___________________ during redox reactions.
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26. Oxidized substance is a substance that ___________________ _________________.
27. Reduced substance is a substance that __________________ __________________. Need Help? Study Book 265 – 268 Set 8 - 13

28. Oxidized substance in a redox reaction acts as a ______________________ agent.
29. Reduced substance in a redox reaction acts as the ______________________ agent.

30. What happens to oxidation number of an oxidized substance in a redox reaction?

31. What happens to oxidation number of a reduced substance in a redox reaction?

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Set D: Oxidation number of elements Objective: To test your ability to determine oxidation number
of elements in formulas.
Write the correct oxidation number next to each element of the given chemical formula.
32. F2 F 33. MgCl2 Mg 34. Al2O3 Al
Cl O

35. CaH2 Ca 36. Na2O2 Na 37. OF2 O
H O F

38. MnCl2 Mn 39. N2O5 P 40. PCl3 P
Need Help? Study Book Pg 262 – 264 Set 2 – 4
Cl O Cl

41. CaSO4 Ca 42. Na2CO3 Na 43. K2PtCl6 K
S C Pt
O O Cl

2- - +
44. SO3 S 45. ClO3 Cl 46. H3O H
O O O

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