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Oxidation Numbers HV 2 O 4 - V 6+ Is the above equation oxidation or reduction? Oxidation numbers are used to quickly determine if oxidation or reduction.

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Presentation on theme: "Oxidation Numbers HV 2 O 4 - V 6+ Is the above equation oxidation or reduction? Oxidation numbers are used to quickly determine if oxidation or reduction."— Presentation transcript:

1 Oxidation Numbers HV 2 O 4 - V 6+ Is the above equation oxidation or reduction? Oxidation numbers are used to quickly determine if oxidation or reduction has occurred in a redox reaction.

2 Rules for Oxidation NumbersOxidation # 1.All elements are zero:

3 Rules for Oxidation NumbersOxidation # 1.All elements are zero: N 2

4 Rules for Oxidation NumbersOxidation # 1.All elements are zero: N 2 0

5 Rules for Oxidation NumbersOxidation # 1.All elements are zero: N 2 0 Pb

6 Rules for Oxidation NumbersOxidation # 1.All elements are zero: N 2 0 Pb 0

7 Rules for Oxidation NumbersOxidation # 1.All elements are zero: N 2 0 Pb 0 Na

8 Rules for Oxidation NumbersOxidation # 1.All elements are zero: N 2 0 Pb 0 Na0

9 Rules for Oxidation NumbersOxidation # 1.All elements are zero: N 2 0 Pb 0 Na0 O 2

10 Rules for Oxidation NumbersOxidation # 1.All elements are zero: N 2 0 Pb 0 Na0 O 2 0

11 Rules for Oxidation NumbersOxidation # 2.Ions are their charge Na +

12 Rules for Oxidation NumbersOxidation # 2.Ions are their charge Na + +1

13 Rules for Oxidation NumbersOxidation # 2.Ions are their charge Na + +1 Br -

14 Rules for Oxidation NumbersOxidation # 2.Ions are their charge Na + +1 Br - -1

15 Rules for Oxidation NumbersOxidation # 2.Ions are their charge Na + +1 Br - -1 MgSO 4

16 Rules for Oxidation NumbersOxidation # 2.Ions are their charge Na + +1 Br - -1 MgSO 4 +2

17 Rules for Oxidation NumbersOxidation # 2.Ions are their charge Na + +1 Br - -1 MgSO 4 +2 Al 2 O 3

18 Rules for Oxidation NumbersOxidation # 2.Ions are their charge Na + +1 Br - -1 MgSO 4 +2 Al 2 O 3 -2

19 Rules for Oxidation NumbersOxidation # 3.The oxidation number of O in a compound is –2. Na 2 O

20 Rules for Oxidation NumbersOxidation # 3.The oxidation number of O in a compound is –2. Na 2 O-2

21 Rules for Oxidation NumbersOxidation # 3.The oxidation number of O in a compound is –2. Na 2 O-2 CO 2

22 Rules for Oxidation NumbersOxidation # 3.The oxidation number of O in a compound is –2. Na 2 O-2 CO 2 -2

23 Rules for Oxidation NumbersOxidation # 3.The oxidation number of O in a compound is –2. Na 2 O-2 CO 2 -2 O 2

24 Rules for Oxidation NumbersOxidation # 3.The oxidation number of O in a compound is –2. Na 2 O-2 CO 2 -2 O 2 0

25 Rules for Oxidation NumbersOxidation # 3.The oxidation number of O in a compound is –2. Na 2 O-2 CO 2 -2 O 2 0 CH 3 COOH

26 Rules for Oxidation NumbersOxidation # 3.The oxidation number of O in a compound is –2. Na 2 O-2 CO 2 -2 O 2 0 CH 3 COOH-2

27 Rules for Oxidation NumbersOxidation # 3.The oxidation number of O in a compound is –2 or in peroxides -1. Na 2 O-2 CO 2 -2 O 2 0 CH 3 COOH-2 HOOH

28 Rules for Oxidation NumbersOxidation # 3.The oxidation number of O in a compound is –2 or in peroxides -1. Na 2 O-2 CO 2 -2 O 2 0 CH 3 COOH-2 HOOH-1

29 Rules for Oxidation NumbersOxidation # 4.The oxidation number for H in a compound is +1.

30 Rules for Oxidation NumbersOxidation # 4.The oxidation number for H in a compound is +1. H 2 O

31 Rules for Oxidation NumbersOxidation # 4.The oxidation number for H in a compound is +1. H 2 O+1

32 Rules for Oxidation NumbersOxidation # 4.The oxidation number for H in a compound is +1 H 2 O+1 C 12 H 24 O 11

33 Rules for Oxidation NumbersOxidation # 4.The oxidation number for H in a compound is +1 H 2 O+1 C 12 H 24 O 11 +1

34 Rules for Oxidation NumbersOxidation # 4.The oxidation number for H in a compound is +1 H 2 O+1 C 12 H 24 O 11 +1 H 2

35 Rules for Oxidation NumbersOxidation # 4.The oxidation number for H in a compound is +1 H 2 O+1 C 12 H 22 O 11 +1 H 2 0

36 Rules for Oxidation NumbersOxidation # 4.The oxidation number for H in a compound is +1 or in metal hydrides -1. H 2 O+1 C 12 H 24 O 11 +1 H 2 0 NaH

37 Rules for Oxidation NumbersOxidation # 4.The oxidation number for H in a compound is +1 or in metal hydrides -1. H 2 O+1 C 12 H 24 O 11 +1 H 2 0 NaH-1

38 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # SO 4 2-

39 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s SO 4 2-

40 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 SO 4 2-

41 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 SO 4 2- Total charge

42 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 SO 4 2- Total charge -8

43 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 SO 4 2- Total charge -8 = -2

44 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 SO 4 2- Total charge+6 -8 = -2

45 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s+6 -2 SO 4 2- Total charge+6 -8 = -2

46 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s+6 -2 +6 SO 4 2- Total charge+6 -8 = -2

47 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # PO 4 3-

48 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s PO 4 3-

49 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 PO 4 3-

50 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 PO 4 3- Total charge

51 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 PO 4 3- Total charge -8

52 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 PO 4 3- Total charge -8 = -3

53 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 PO 4 3- Total charge+5 -8 = -3

54 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s+5 -2 PO 4 3- Total charge+5 -8 = -3

55 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s+5 -2 +5 PO 4 3- Total charge+5 -8 = -3

56 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # Cr 2 O 7 2-

57 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s Cr 2 O 7 2-

58 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 Cr 2 O 7 2-

59 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 Cr 2 O 7 2- Total charge

60 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 Cr 2 O 7 2- Total charge -14

61 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 Cr 2 O 7 2- Total charge -14 = -2

62 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 Cr 2 O 7 2- Total charge +12 -14 = -2

63 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s -2 Divide by 2 Cr 2 O 7 2- Total charge +12 -14 = -2

64 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s +6 -2 Cr 2 O 7 2- Total charge +12 -14 = -2

65 Rules for Oxidation Numbers 5.All other oxidation numbers are assigned so that the sum of all of the oxidation numbers is equal to the charge on the chemical species. Oxidation # oxidation #s +6 -2 +6 Cr 2 O 7 2- Total charge +12 -14 = -2

66 Oxidation # Ca(NO 3 ) 2

67 Oxidation # +2 Ca(NO 3 ) 2

68 Oxidation # +2 Ca(NO 3 ) 2 +2

69 Oxidation # Na 2 C 2 O 4

70 Oxidation # +1 -2 Na 2 C 2 O 4 +2 -8 = 0

71 Oxidation # +1 -2 Na 2 C 2 O 4 +2 +6 -8 = 0

72 Oxidation # +1 +3 -2 Na 2 C 2 O 4 +3 +2 +6 -8 = 0

73 Oxidation # CH 3 COOH

74 Oxidation # Rewrite C 2 H 4 O 2

75 Oxidation # Rewrite +1 -20 C 2 H 4 O 2 +4 -4 = 0

76 Oxidation # Zn(OH) 4 2-

77 Oxidation # +2 -2 +1 +2 Zn(OH) 4 2- +2 -8 +4 = -2

78 Oxidation # H 2 PtCl 6

79 Oxidation # +1 +4 -1 +4 H 2 PtCl 6 +2 +4 -6 = 0

80 Oxidation # Al(NO 3 ) 3

81 Oxidation # +3 +5 -2 +5 Al(NO 3 ) 3 +3 +15 -18 = 0

82 Oxidation # H 3 PO 3

83 Oxidation # +1 +3 -2 +3 H 3 PO 3 +3 +3 -6 = 0

84 Oxidation # Na 2 O 2

85 Oxidation # +1 -2 Na 2 O 2 +2 -4 = 0 Exception - does not work, O must be -1

86 Oxidation # +1 -1-1 Na 2 O 2 +2 -2 = 0 Exception - does not work, O must be -1

87 Oxidation # CaH 2

88 Oxidation # +2 +1 CaH 2 +2 +2 = 0 Exception - does not work, H must be -1

89 Oxidation # +2 -1-1 CaH 2 +2 -2 = 0 Exception - does not work, H must be -1

90 Oxidation # Fe(H 2 O) 5 (OH) 2+

91 Oxidation # 0 -1 Fe(H 2 O) 5 (OH) 2+ Water has a charge of 0 OH has a charge of -1

92 Oxidation # 0 -1 Fe(H 2 O) 5 (OH) 2+ ? + 0 -1 =+2

93 Oxidation # 0 -1+3 Fe(H 2 O) 5 (OH) 2+ ? + 0 -1 =+2

94 Oxidation Numbers HV 2 O 4 - V 6+ Is the above equation oxidation or reduction?

95 Oxidation Numbers +3 +6 HV 2 O 4 - V 6+ Is the above equation oxidation or reduction?

96 Oxidation Numbers Increase +3 +6 HV 2 O 4 - V 6+ Is the above equation oxidation or reduction? If the oxidation number increases it is oxidation.


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