Write the postulates of electron pair repulsion theory. Explain the shape of theH2O on the basis of
electron pair repulsion theory.
(c) Balance the given equations by ION electron method.
* Cl2+OH-1 Cl-1
+ Cl
+ H2O (Basic)
* Mn
+ S
MnO2+ S
(Acidic)
Answers
Answer:
Cl
2
+OH
−
→Cl
−
+ClO
3
−
First half reaction
C
0
l
2
→
C
+5
lO
3
−
Balancing Cl,Cl
2
→2ClO
3
(a) To balancing oxygen atoms, H20 as added to left side.
Cl
2
+6H
2
O→2ClO
3
−
(b) To balanced hydrogen atoms, H
+
are added to right side
Cl
2
+6H
2
O→2ClO
3
−
+12H
+
∴ Reaction i sthe basic medium OH
−
are added to left side
∴Cl
2
+6H
2
O+120H
−
→2ClO
3
−
+12H
2
O
(c) To balance change, electrons are added to the right side,
Cl
2
+6H
2
O+120H
−
→2CO
3
−
+12H
2
O+10
e
−
Second half reaction
C
0
l
2
→
C
−1
l
−
Balancing Cl,Cl
2
→2Cl
−
(a) To balance charge, electrons are added to left side,
Cl
2
+e
−
→2Cl
−
Multiplying equations (i) by 1 and equation (ii) by 2 and add
3Cl
2
+6OH
−
→5Cl
−
+ClO
3
−
+3H
2
O
6Cl
2
+12OH
−
→2 ClO
3
−
+10Cl
−
+6H
2
O
Cl
2
+6H
2
O+12OH
−
→2ClO
3
−
+12H
2
O+10
e
−
5Cl
2
+10
e
−
→10Cl
−
This is balanced equation.