OH +2 Zn+NO; →NH + Zn+2 3
Answers
Answer:
MARKAS BRAINLIEST
Explanation:
The unbalanced redox equation is as follows:
Zn+NO
3
−
→ZnO
2
2−
+NH
3
All atoms other than H and O are balanced.
The oxidation number of Zn changes from 0 to +2. The change in the oxidation number of Zn is +2.
The oxidation number of N changes from +5 to -3. The change in the oxidation number of N is 8.
The increase in the oxidation number is balanced with decrease in the oxidation number by multiplying
Zn and ZnO
2
2−
with 4.
4Zn+NO
3
−
→4ZnO
2
2−
+NH
3
O atoms are balanced by adding 5 water molecules on LHS..
4Zn+NO
3
−
+5H
2
O→4ZnO
2
2−
+NH
3
Hydrogen atoms are balanced by adding 7 H
+
atoms on the LHS.
4Zn+NO
3
−
+5H
2
O→4ZnO
2
2−
+NH
3
+7H
+
Since the reaction occurs in basic medium, add 7 hydroxide ions on both sides of the equation.
4Zn+NO
3
−
+5H
2
O+7OH
−
→4ZnO
2
2−
+NH
3
+7H
+
+7OH
−
On RHS, 7 H
+
ions combine with 7 OH
−
ions to form 2 water molecules out of which, five water molecules cancels with one water molecule on LHS.
4Zn+NO
3
−
+7OH
−
→4ZnO
2
2−
+NH
3
+2H
2
O
This is the balanced chemical equation.