# Balance Redox Reaction: 2PbO2 + 4H+ = 2Pb 2+ + O2 + 2H2O

• Renaldo
In summary, to balance an oxidation-reduction reaction, you must determine the valence numbers for all elements, balance the transfer of electrons, and then balance the elements by adding H2O and H+. Following these steps, the balanced reaction for PbO2 = Pb 2+ + O2 is 2PbO2 + 4H+ = 2Pb 2+ + O2 + 2H2O.
Renaldo

## Homework Statement

Balance the following oxidation-reduction reactions:

PbO2 = Pb 2+ + O2

## Homework Equations

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These are the steps I'm supposed to follow.

1. Determine the valence number (charge) for all the elements involved in the reaction.
2. Determine the number of e- given off and taken up in the reaction. Balance the transfer of electrons.
3. Balance the elements, except oxygen and hydrogen, on both sides of the equation.
4. Balance the number of oxygen atoms by adding H2O.
5. Balance the number of hydrogen atoms by adding H+

## The Attempt at a Solution

1. Reactants: Pb = +4 and O = -2. Products: Pb = +2 and O = 0.
2. To balance the transfer of electrons, multiply Pb 2+ by 2 (because O2 gained four electrons).
3. Balancing: 2PbO2 = 2Pb 2+ + O2
4. Adding H2O: 2PbO2 = 2Pb 2+ + O2 + 2H2O
5. Adding H+: 4H+ + 2PbO2 = 2Pb 2+ + O2 + 2H2O

2PbO2 + 4H+ = 2Pb 2+ + O2 + 2H2O

Is this right?

Looks OK.

## 1. How do you balance a redox reaction?

To balance a redox reaction, you need to identify the oxidized and reduced atoms in the reaction and determine their oxidation numbers. Then, you can use coefficients to balance the number of atoms and the charge on each side of the reaction.

## 2. What is the oxidation number of Pb in the reaction 2PbO2 + 4H+ = 2Pb 2+ + O2 + 2H2O?

The oxidation number of Pb in the reaction is +4, as it is bonded to two oxygen atoms with an oxidation number of -2 each.

## 3. How many moles of H+ are needed to balance the reaction 2PbO2 + 4H+ = 2Pb 2+ + O2 + 2H2O?

Since there are 4 H+ on both sides of the reaction, no additional moles of H+ are needed to balance the reaction.

## 4. What is the product formed in the reaction 2PbO2 + 4H+ = 2Pb 2+ + O2 + 2H2O?

The products of this reaction are 2Pb2+, O2, and 2H2O. Pb2+ and O2 are the result of the reduction of PbO2, while H2O is formed from the reduction of H+.

## 5. What is the overall charge on both sides of the reaction 2PbO2 + 4H+ = 2Pb 2+ + O2 + 2H2O?

The overall charge on both sides of the reaction is 0, as the number of positive and negative charges are balanced.

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