Balancing Redox Reactions
-
Upload
lester-george -
Category
Documents
-
view
67 -
download
4
description
Transcript of Balancing Redox Reactions
![Page 1: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/1.jpg)
Balancing Redox Balancing Redox ReactionsReactions
![Page 2: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/2.jpg)
StepsSteps::
1. Assign oxidation numbers
2. Write half reactions
3. Balance electrons to determine coefficients needed
![Page 3: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/3.jpg)
2HgO O2 + 2Hg+2 -2 0 0
Hg+2 + 2e- Hg0 Reduction
Problem 1:
O-2 O0 + 2e- Oxidation
![Page 4: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/4.jpg)
2KClO3 2KCl + 3O2
+1 +5 -2 +1 -1 0
6e- + Cl+5 Cl-1 Reduction
Problem 2:
3(O-2 O0 + 2e-) Oxidation
![Page 5: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/5.jpg)
2HCl + Zn ZnCl2 + H2
+1 -1 0 +2 -1 0
2e- + 2H+1 H20 Reduction
Problem 3:
Zn0 Zn+2 + 2e- Oxidation
![Page 6: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/6.jpg)
2Ag NO3 + Cu Cu(NO3)2 + 2Ag+1 +5 -2 0 +2 +5 -2 0
2e- + 2Ag+1 2Ag0 Reduction
Problem 4:
Cu0 Cu+2 + 2e- Oxidation
![Page 7: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/7.jpg)
4NH3 + 3O2 2N2 + 6H2O -3 +1 0 0 +1 -2
12e- + 3O20 6O-2 Reduction
Problem 5:
4N-3 2N20 + 12e- Oxidation
![Page 8: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/8.jpg)
3Mg + 2Al(NO3)3 2Al + 3Mg(NO3)2
0 +3 +5 -2 0 +2 +5 -2
6e- + 2Al+3 2Al0 Reduction
Problem 6:
3Mg0 3Mg+2 + 6e- Oxidation
![Page 9: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/9.jpg)
3Ca + 2Al3+ 3Ca2+ + 2Al 0 +3 +2 0
6e- + 2Al+3 2Al0 Reduction
Problem 6:
3Ca0 3Ca+2 + 6e- Oxidation
![Page 10: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/10.jpg)
2Fe3+ + Sn2+ 2Fe2+ + Sn4+
2e- + 2Fe+3 2Fe+2 Reduction
Problem 7:
Sn+2 Sn+4 + 2e- Oxidation
![Page 11: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/11.jpg)
2HNO3 + 3MnCl2 + 6HCl 2NO + 3MnCl4 + 4H20+1 +5 -2 +2 -1 +1 -1 +2 -2 +4 -1 +1 -2
6e- + 2N+5 2N+2 Reduction
Problem 8:
3Mn+2 3Mn+4 + 6e- Oxidation
![Page 12: Balancing Redox Reactions](https://reader035.fdocuments.us/reader035/viewer/2022081503/56812b24550346895d8f2015/html5/thumbnails/12.jpg)
K2(Cr2O7) + 14HCl 3Cl2 + 7H2O + 2CrCl3 + 2KCl+1 +6 -2 +1 -1 0 +1 -2 +3 -1 +1 -1
6e- + Cr2+6 2Cr+3 Reduction
Problem 9:
6Cl-1 3Cl20 + 6e- Oxidation