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Summary Redox reactions
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  • Course
  • Chemistry
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  • Fifth Year / 11th Grade

Biology digital notes for highschool students. Easy to read and understand illustrative notes. Detailed explanation of every topic. Reading of this document is tough for understanding the important concepts of the topic

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Document information

  • March 7, 2024
  • 10
  • 2023/2024
  • Summary

Subjects

  • chemistry
  • class 11
  • high school science
  • digital notes

Written for

  • Secondary school
  • Chemistry
  • 5
All documents for this subject (167)

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gurmannat

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Redox Reactions
Oxidation number
The total number of charge on an atom or ion is known as oxidation
number.
Note: there as t wo types of non-zero oxidation numbers: positive &
negative.
Nall Nat + C
ON >
-

1
+
KU k + U-
+
HC H + C-

solution
ageous

Rules for calculating oxidation number

For all alkali metals For halogens
Li ,
Na , K ,
Rb Cs
,
+1 (When they are side atoms)
F C Br I
, , , -1
For all alkaline earth metals
Be , Mg ,
Ca ,
Sr ,
Ba +2

For baron & almunium
+3
Hydrogen (metal) -1
Hydrogen (non-metal) +1


For oxygen
Generally -2

, Change conservation principle
Charge wither be created nor destroyed but it can transfer from
one species to another species.


H2SO4 POy3-
2x H +
1x3 + 4x0 =
M 1xP + 4x0 = -
3

2x1 + 1xx + 4x( 2) -
=
0 1xx + 4x( 2) = -
3

2+x -
8 = 0 x -
8 = -


3

x = + 6 x = +5




H2S03 KMnOn

2xH + 1xS + 3x0 =
0 1xK + 1XMn + 4 x 0 =
0
2x1 + (xx + 3x( 2) =
0
1x1 + 1xx + 4x( -



) =
0
2 + x -


6 =
0
1 + x -
8 =
0
x -

4 =
0
x =
7
x = 4



H3POy K2Cr20 +



2xk + 2x( + - x0 =
0
3x H + 1xP + 4x0 0
(x( 2)
=
2x1 + 2xx + -
=
0
3x1 + 4xx + n( 2) - =
0 2 + 2x -

14 = 0
+
3 x -
8 =
0 6
x
=


x =
5


NazSO4 Naz(Os

2xNa + 4xS + 4 x0 =
0 2xNa + 1x( + 3 x0 = 0

2x1 + 1xx + 4x( 2) -
=
0 2x1 + 4xx + 3x(2) = 0
2 + x -
8 =
0 2 + x -


6 = 0

x =
6 x =
4

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