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Balance the following redox reactions. ...

Balance the following redox reactions.
Coppoer reacts with nitric acid, a brown, gas is formed and solution turns blue.
a. `Cu+NO_(3)^(ө)rarrNO_(2)+Cu^(2+)`
b. `Cr(OH)_(4)^(ө)+H_(2)O_(2)rarrCrO_(4)^(2-)+H_(2)O` (basic solutions)
c. `SnO_(2)+CrarrSn+CO`
d. `Fe_(2)O_(3)+CrarrFe+CO`

Text Solution

Verified by Experts

The correct Answer is:
A
a. `Cu+2NO_(3)^(ө)+4H^(o+)rarrCu^(2+)+2H_(2)O+2NO_(2)`
b. `2Cr(OH)_(4)^(ө)+3H_(2)O_(2)+2overset(ө)OHrarr2CrO_(4)^(2-)+8H_(2)O` (basic solution)
c. `SnO_(2)+2CrarrSn+2CO`
d. `Fe_(2)O_(3)+3Crarr2Fe+3CO`
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