Oxidation and Reduction in Biotechnology through Erasmus+ Sustainability
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Renée Ristl
Evelin Szabados
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Oxidation: electron donation
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Reduction: electron acceptance
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Example:
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Oxidation: 2 O
2-
O
2
+ 4 e
-
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Reduction: Fe
3+
+ e
-
Fe
2+
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Both, oxidation and reduction have to occur
together!
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Often there aren‘t “real“ molecular charges – e.g.
glucose or water
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Atoms possess an oxidation state, described by
oxidation numbers
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H
2
, O
2
are neutral
oxidation number 0
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In water (H
2
O), the H has got the oxidation number
+1, the O: -2
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In organic compounds, the oxidation number of C has
to be calculated
C
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:
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C
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E.g. glucose:
-
2
+
1
+1 – 2
= -1
C is neutral
it needs
+1
to equalise
+
1
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Oxidation: 2 H
2
4 H
+
+ 4 e
-
0
+1
Reduction: O
2
+ 4 e
-
2 O
2-
0
-2
R
+1
R
+3
+ 2 e
-
Oxidation:
Together: 2 H
2
+ O
2
2 H
2
O
Explore the concept of oxidation and reduction in biotechnology with the help of Erasmus+ Sustainability, discussing electron donation, electron acceptance, oxidation numbers, and calculation examples. Learn how these processes work together for sustainable biotechnological applications.
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Presentation Transcript
Erasmus+ Sustainability by Biotechnology Oxidation and Reduction Ren e Ristl Evelin Szabados
Definition Oxidation: electron donation Reduction: electron acceptance Example: Oxidation: 2 O2- O2 + 4 e- Reduction: Fe3+ + e- Fe2+ Both, oxidation and reduction have to occur together!
Oxidation numbers Often there aren t real molecular charges e.g. glucose or water Atoms possess an oxidation state, described by oxidation numbers H2, O2 are neutral oxidation number 0 In water (H2O), the H has got the oxidation number +1, the O: -2 In organic compounds, the oxidation number of C has to be calculated
Calculation: Oxidation number of C E.g. glucose: + 1 -2 + 1 +1 2 = -1 C is neutral it needs +1 to equalise
Examples +1 0 Oxidation: 2 H2 4 H+ + 4 e- Together: 2 H2+ O2 2 H2O -2 0 Reduction: O2 + 4 e- 2 O2- +3 +1 Oxidation: + 2 e- R R
