1
You visited us
1
times! Enjoying our articles?
Unlock Full Access!
Byju's Answer
Standard XII
Chemistry
Types of Redox Reactions
How to balanc...
Question
How to balance the equation by redox reaction by ion -electron method in basic medium
Open in App
Solution
Step 1. Write a sceleton equation
Step 2. Separate the redox reaction into half-reactions
a) Assign oxidation numbers for each atom
b) Identify and write out all redox couples in reaction
c) Combine these
redox couples into two half-reactions
Step 3. Balance the atoms in each half reaction
a) Balance all other atoms except H and O
b) Balance the oxygen atoms with H
2
O
c) Balance the hydrogen atoms with H
+
d) In a basic medium, add one OH
-
to each side for every H
+
Step 4. Balance the charge with e
-
Step 5: Make electron gain equivalent to electron loss in the half-reactions
Step 6: Add the half-reactions together
Step 7: Simplify the equation
Finally, check that the elements and charges are balanced
Sample redox equations
Acidic medium
H2O2 = H2O + O2
Ca + Cl2 = CaCl2
Cu + HNO3 = Cu2+ + NO
SCN- + O2 = SO42- + HCO3- + NO3-
Zn + HNO3 = Zn(NO3)2 + NH4NO3
Fe2O3 + CO = Fe + CO2
P4 + HNO3 + H2O = H3PO4 + NO
Basic medium
I- + OCl- = I2 + Cl- + H2O
CH3OH + MnO4- = CO32- + MnO42-
CrI3 + Cl2 = CrO42- + IO4- + Cl-
Zn + NO3- = Zn(OH)42- + NH3
MnO4- + SO32- = MnO2 + SO42-
Pb(OH)42- + ClO- = Pb
Suggest Corrections
23
Similar questions
Q.
How to balance a reaction taking place in basic medium by ion electron method? Explain.
Q.
Balance the following equation by ion electron method.
K
3
F
e
(
C
N
)
6
+
C
r
2
O
3
+
K
O
H
→
K
4
F
e
(
C
N
)
6
+
K
2
C
r
O
4
+
H
2
O
(basic medium).
Q.
Balance the following redox reactions by the ion-electron method
in basis medium
M
n
O
−
4
(
a
q
)
+
I
−
(
a
q
)
→
M
n
O
2
(
s
)
+
I
2
(
s
)
Q.
Balance the following redox reactions by the ion-electron method in acidic medium.
M
n
O
−
4
(
a
q
)
+
S
O
2
(
g
)
→
M
n
2
+
(
a
q
)
+
H
S
O
−
4
(
a
q
)
Q.
Balance the following redox equation by ion-eletron method taking place in acidic medium.
C
r
2
O
2
−
7
+
N
O
−
2
→
C
r
3
+
+
N
O
−
3
View More
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
Related Videos
Types of Redox Reactions
CHEMISTRY
Watch in App
Explore more
Types of Redox Reactions
Standard XII Chemistry
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
AI Tutor
Textbooks
Question Papers
Install app