Another le chatelier qsneed to make sure

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In summary, if dilute HCl is added to the K2CrO4 solution, the equilibrium reaction between 2CrO4(aq) and 2H+(aq) will shift to the right due to the addition of HCl, as the acid will donate a proton and react with H+ to produce hydrogen gas. However, the extent of the shift will depend on the concentrations of the reactants and products.
  • #1
angel_eyez
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1. for the equilibrium reaction below predict what would happen if dilute HCl were added to the K2CrO4 solution?



2. 2CrO4(aq) + 2H+(aq) <--> Cr2O7(aq) + H2O



3. The reaction will shift to the right because the acid will donate a proton which will react with H+ to produce hydrogen gas so therefore the rxn has to shift to the right to use up HCl. i need to knwo if this is righhtt. THXN
 
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  • #2
Try writing the equation for the ionization of HCl.

BTW, H+ will not donate a proton to another H+ to form hydrogen...

H+ + H+ -----> H2++ ? (won't happen)
 
  • #3
So there will b no change in the equation??
 
  • #4
I guess it depends on how dilute the HCl is compared to the concentrations of the reactants and products. If the HCl did contribute significantly, the HCl would ionize to produce more H+, so the reaction would shift to the right to counteract the addition of reactants.
 

1. How does Le Chatelier's principle apply to this situation?

Le Chatelier's principle states that when a system at equilibrium is subjected to a stress, it will shift to counteract that stress and restore equilibrium. In this case, we can use this principle to predict how changing certain factors will affect the equilibrium of the reaction.

2. What factors can be changed to affect the equilibrium of this reaction?

The factors that can be changed include temperature, pressure, concentration of reactants and products, and the presence of a catalyst. By altering these factors, we can manipulate the equilibrium position and shift the reaction towards either the reactants or products.

3. How can I determine the direction in which the reaction will shift?

The direction of the shift depends on the nature of the stress applied. For example, if the temperature is increased, the reaction will shift in the endothermic direction to absorb the excess heat. If the pressure is decreased, the reaction will shift in the direction that produces more moles of gas to increase the pressure.

4. Can Le Chatelier's principle be applied to all types of reactions?

Le Chatelier's principle can be applied to any reversible reaction, as long as the reaction is not at equilibrium. It does not apply to irreversible reactions since they cannot shift back to the reactants. Additionally, it is not applicable to reactions that do not involve changes in temperature, pressure, or concentration.

5. How can I use Le Chatelier's principle to optimize the yield of the reaction?

By manipulating the factors that affect equilibrium, we can optimize the yield of the reaction. For example, increasing the concentration of the limiting reactant or using a catalyst can shift the reaction towards the desired products and increase the yield. It is important to carefully consider the effects of each factor on the equilibrium position to achieve the desired yield.

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