H2 + ReO-4 ———> ReO2 + H2O....Balance the given equation
Answers
Answer:
please mark me as brainliest and thanks me please do please
Explanation:
ReO4 + 2H2 → ReO2 + 2H2O
Answer:
The unbalanced redox equation is as follows:
H
2
+ReO
4
−
→
OH
−
ReO
2
+H
2
O
All atoms other than H and O are balanced..
The oxidation number of Re changes from 7 to 4. The change in the oxidation number of Re is 3.
The oxidation number of H changes from 0 to 1. The change in the oxidation number per H atom is 1. For 2 H atoms, the change in the oxidation number is 2
The increase in the oxidation number is balanced with decrease in the oxidation number by multiplying ReO
4
−
and ReO
2
with 2 and by multiplying H
2
and CIO
2
−
with 3.
3H
2
+2ReO
4
−
→
OH
−
2ReO
2
+3H
2
O
O atoms are balanced by adding 1 water molecule on RHS.
3H
2
+2ReO
4
−
→
OH
−
2ReO
2
+4H
2
O
To balance H atoms, add 2 H
+
on LHS.
3H
2
+2ReO
4
−
+2H
+
→
OH
−
2ReO
2
+4H
2
O
Since the reaction occurs in basic medium, add 2 hydroxide ions on both sides of the equation.
3H
2
+2ReO
4
−
+2H
+
+2OH
−
→
OH
−
2ReO
2
+4H
2
O+2OH
−
On LHS, 2 H
+
ions combine with 2 OH
−
ions to form 2 water molecules which cancel out with 2 water molecules on RHS.
3H
2
+2ReO
4
−
→
OH
−
2ReO
2
+2H
2
O+2OH
−
This is the balanced chemical equation.