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balance the following redox reaction in a basic environment Fe^3+(aq) + NO(g) --> Fe(s) + HNO2...

balance the following redox reaction in a basic environment Fe^3+(aq) + NO(g) --> Fe(s) + HNO2 (aq)

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Answer #1

Half reaction,

Fe3+(aq) ---> Fe(s)

Balance e-,

Fe3+ + 3e- --> Fe

Second half cell,

NO(g) ---> HNO2(aq)

Balance O,

NO + H2O ---> HNO2

balance H,

NO + H2O ---> HNO2 + H+

Add OH-,

NO + OH- + H2O ---> HNO2 + H2O

NO + OH- ---> HNO2

Add e-,

NO + OH- ---> HNO2 + H2O + e-

multiply by 3,

3NO + 3OH- ---> 3HNO2 + 3H2O + 3e-

Add half cells

Fe3+ + 3e- --> Fe

3NO + 3OH- ---> 3HNO2 + 3H2O + 3e-

-----------------------------------------------------

Fe3+(aq) + 3NO(g) + 3OH-(aq) ----> Fe(s) + 3HNO2(aq) + 3H2O(l)

is the final balanced equation

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