Net Potential for Reaction Products: Fe2+ + Co3+ & CrO42- + MoO2

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In summary, the net potential for a redox reaction can be calculated using the Nernst equation, which takes into account the concentrations of the reactants and products, as well as the standard potential for the reaction. This net potential can be determined by writing balanced half-reactions and taking the difference between their standard potentials. The products of a redox reaction between two species, such as CrO42- and MoO2, are the reduced forms of the reactants. The net potential for a redox reaction can be negative, indicating that the reaction is not spontaneous and will require an external energy source. The concentration of reactants can also affect the net potential, as an increase in concentration can decrease the standard potential and ultimately impact the
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Homework Statement



For each reaction, give balanced chemical equations or NR (no reaction) and rationalize your answers in terms of trends in oxidation states. Calculate net potential for the reactions:

a) Fe2+(aq) + Co3+ (aq) (acidic conditions) →b) CrO42−(aq) + MoO2(s) + H+ (acidic conditions) →

Homework Equations


The Attempt at a Solution



a) no reaction

b) 2CrO42−(aq) + MoO2(s) + 4H+ → Cr2O72- + 2H2O + Mo4+

Is this correct?
 
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In the first case you are asked whether Co3+ is an oxidizer strong enough to oxidize Fe2+. Second question is similar.
 

1. What is the net potential for the reaction between Fe2+ and Co3+?

The net potential for the reaction between Fe2+ and Co3+ can be calculated using the Nernst equation, which takes into account the concentrations of the reactants and products, as well as the standard potential for the reaction. The net potential is a measure of the overall driving force of the reaction and can be used to predict whether the reaction will proceed spontaneously or not.

2. How do you determine the net potential for a redox reaction?

The net potential for a redox reaction can be determined by first writing the balanced half-reactions for the oxidation and reduction processes, and then using the Nernst equation to calculate the standard potential for each half-reaction. The net potential is then determined by taking the difference between the two standard potentials.

3. What are the products of the reaction between CrO42- and MoO2?

The products of the reaction between CrO42- and MoO2 are Cr3+ and MoO42-, as these are the reduced forms of the reactants. The overall reaction involves the transfer of electrons between the reactants, resulting in the formation of these products.

4. Can the net potential for a redox reaction be negative?

Yes, the net potential for a redox reaction can be negative. This indicates that the reaction is not spontaneous and will require an external energy source to proceed. The magnitude of the net potential can also indicate the rate at which the reaction will occur.

5. How does the concentration of reactants affect the net potential?

The concentration of reactants can affect the net potential by altering the standard potential for the reaction. According to the Nernst equation, as the concentration of reactants increases, the standard potential decreases, resulting in a lower net potential. This can have an impact on the spontaneity and rate of the reaction.

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