When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?NO + SO42-NO3- + H2SO3What does Water appear as in the balanced equation as and with what  coefficient? How many electrons are transferred in this reaction?

Question
Asked Oct 4, 2019

When the following equation is balanced properly under acidic conditions, what are the coefficients of the species shown?

NO + SO42-NO3- + H2SO3

What does Water appear as in the balanced equation as and with what  coefficient? 

How many electrons are transferred in this reaction? 

check_circleExpert Solution
Step 1

Balancing redox reaction by ion-electron method:

In the ion-electron method (also called the half-reaction method), the redox equation is separated into two half-equations - one for oxidation and one for reduction. Each of these half-reactions is balanced separately and then combined to give the balanced redox equation.

Steps for balancing a redox reaction:

  1. Produce unbalanced equation for the reaction in ionic form.
  2. Separate the equation into half-reactions.
  3. Balance the atoms other than O and H in each half reaction individually.
  4. For reactions occurring in acidic medium, add H2O to balance O atoms and H+ to balance H atoms.
  5. Add electrons to one side of the half reaction to balance the charges. If need be, make the number of electrons equal in the two half reactions by multiplying one or both half reactions by appropriate number.
Step 2

Given reaction:

As N oxidation state changes from +2 to +5, it is undergoing oxidation by loosing electrons. And oxidation state of S changes from +6 to +4; it is undergoing reduction by gaining electrons.

NO SO2NO H2SO3
NO3
H2SO
2(+1)+x+3(-2) 0
2
SO
NO
4
x+3(-2)
x-6 -
X+4(-2) 2
x+(-2) 0
2+x-6 0
x-8 -2
x-2 0
x-4 0
x= -1+6
x= -2+8
x +2
x +4
x +5
x +6
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Image Transcriptionclose

NO SO2NO H2SO3 NO3 H2SO 2(+1)+x+3(-2) 0 2 SO NO 4 x+3(-2) x-6 - X+4(-2) 2 x+(-2) 0 2+x-6 0 x-8 -2 x-2 0 x-4 0 x= -1+6 x= -2+8 x +2 x +4 x +5 x +6

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Step 3

Balancing reduction h...

Step-1: Balance S atoms
SO22H2SO3
Step-2: For balancing O, add same number of H2O molecules
SO22H2SO3 +H20
Step-3:For balancing of H, add same number ofH
ions at deficient side.
SO224H
H2SO3 + H20
Step-4: To balance charges, add same number of electrons at deficient side
SO224H
2e » H2SO3 + H20
Step-5: Multiply the above equation by 3
3SO2212H + 6e
3H2SO33H20
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Image Transcriptionclose

Step-1: Balance S atoms SO22H2SO3 Step-2: For balancing O, add same number of H2O molecules SO22H2SO3 +H20 Step-3:For balancing of H, add same number ofH ions at deficient side. SO224H H2SO3 + H20 Step-4: To balance charges, add same number of electrons at deficient side SO224H 2e » H2SO3 + H20 Step-5: Multiply the above equation by 3 3SO2212H + 6e 3H2SO33H20

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Chemistry

Redox Reactions

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