Redox Equations: Balancing Half Reactions

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In summary, figuring out one side of a redox half equation when the other side is given requires knowledge of the oxidation states of the atoms involved. However, the oxidation states can often be determined if the oxidation state of one atom and the total charge on the ion are known. Oxygen typically has a charge of -2, but can also have other oxidation states such as 0, +2, -1, and +1. Halogens also have varying oxidation states, with fluorine always having a charge of -1.
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campa
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hi,

Is there a way to figure out one side of a redox half equation when the other side is given? ex- Mn04- -> Mn2+
 
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You generally need to know the oxidation states of the atoms of the compound under consideration, but often then can be figured out if you know the oxidation state of one of the atoms and the total charge on the ion. Oxygen is always -2, for instance, and the halogens are always -1.
 
  • #3
Not really.Oxygen can be 0,+2,-1,-2 and +1.Halogens can have many ON-s,the simplest case is fluorine which ALWAYS -1.

Daniel.
 

Related to Redox Equations: Balancing Half Reactions

1. What is a redox equation?

A redox equation is a chemical equation that represents a redox reaction. Redox reactions involve the transfer of electrons between different reactants, resulting in changes in oxidation states.

2. Why is it important to balance half reactions in redox equations?

Balancing half reactions ensures that the total number of electrons transferred in the reaction is equal, and that the overall charge is conserved. This allows for a complete and accurate representation of the redox reaction.

3. What is the process for balancing half reactions?

The process for balancing half reactions involves first identifying the atoms that are undergoing changes in oxidation state. Then, balance the atoms and charges on each side of the equation by adding or subtracting electrons. Finally, balance the remaining elements by adding appropriate coefficients.

4. Can you balance redox equations using the same methods as other chemical equations?

No, redox equations require additional steps to balance the transfer of electrons. Standard methods for balancing equations, such as using coefficients, will not accurately represent the changes in oxidation states.

5. Are there any shortcuts for balancing redox equations?

Yes, there are several shortcuts that can be used to balance redox equations, such as the half reaction method and the oxidation number change method. These methods involve breaking the redox equation into two half reactions and balancing them separately before combining them to form the complete equation.

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