Why Does Ethanol Not Affect the Equilibrium of the Dichromate Reaction?

In summary, adding acid to a reaction can affect the equilibrium by increasing the concentration of hydrogen ions in the solution. The direction of the equilibrium shift depends on the initial concentrations of reactants and products. The equilibrium constant of a reaction can also be affected by the addition of acid. The strength of the acid can influence the equilibrium by changing the concentration of H+ ions. In some cases, adding acid can lead to an equilibrium with no acid present due to its reaction with a reactant or its consumption in the reaction.
  • #1
Jan Hill
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Homework Statement


why does C2H5OH not affect the equilibrium of H+(aq) + 2CrO4-2(aq)---- yielding in a reversible reaction-----Cr2O7-2(aq) + OH-(aq)

Homework Equations





The Attempt at a Solution



Is it because C2H5OH is such a weak acid that it does not dissociate and therefore does not add H+ ions to the reaction and therefore does not affect the reaction?
 
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  • #2
That sounds right.
 
  • #3


That is one possible explanation. Another potential reason could be that C2H5OH is a neutral molecule and does not have any significant effect on the ionic species in the reaction. Additionally, the equilibrium of the reaction may be controlled by the concentrations of the reactants and products, rather than the presence of a weak acid like C2H5OH. It would be important to consider the specific conditions and concentrations in order to fully understand the impact of C2H5OH on the equilibrium.
 

Related to Why Does Ethanol Not Affect the Equilibrium of the Dichromate Reaction?

1. How does adding acid affect an equilibrium?

When acid is added to a reaction, it increases the concentration of hydrogen ions (H+) in the solution. This can shift the equilibrium of the reaction by either consuming or producing more of the reactants or products, depending on the specific equilibrium reaction.

2. Does adding acid always shift the equilibrium to the left?

No, the direction in which an equilibrium shifts when acid is added depends on the relative concentration of the reactants and products in the reaction. If the reaction is initially at equilibrium, adding acid will cause the reaction to shift in the direction that consumes H+ ions, resulting in a decrease in the concentration of H+ ions and a shift to the right. However, if the reaction is not initially at equilibrium, the direction of the shift cannot be determined without knowledge of the initial concentrations.

3. Can acid affect the equilibrium constant (K) of a reaction?

Yes, adding acid can affect the equilibrium constant of a reaction. The equilibrium constant (K) is a measure of the ratio of products to reactants at equilibrium, and it is affected by changes in temperature, pressure, and concentration. When acid is added, the equilibrium constant may change due to changes in the concentration of reactants and products in the reaction.

4. How does the strength of the acid affect its influence on the equilibrium?

The strength of an acid can affect its influence on the equilibrium by altering the concentration of H+ ions in the solution. Strong acids, such as hydrochloric acid, dissociate completely in water, resulting in a high concentration of H+ ions and a more significant shift in the equilibrium. In contrast, weak acids, such as acetic acid, only partially dissociate, resulting in a lower concentration of H+ ions and a smaller shift in the equilibrium.

5. Can adding acid to a reaction ever result in an equilibrium with no acid present?

Yes, adding acid to a reaction can result in an equilibrium with no acid present. This can occur when the acid reacts with one of the reactants to form a new compound or when the acid is consumed in the reaction. In both cases, the equilibrium will shift to the right until the concentration of H+ ions decreases, and the reaction reaches a new equilibrium with no acid present.

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