Chemical Equilibrium: AgCl + NaCl Effects

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In summary, the conversation discusses the equilibrium of ionic compounds in water, specifically silver chloride (AgCl). It is mentioned that even though AgCl is normally considered insoluble, it actually dissociates into ions in water. The addition of NaCl to a beaker containing solid AgCl is then discussed, with the question being whether the equilibrium components (mass of AgCl, concentration of Ag(aq), and concentration of Cl(aq)) will increase, decrease, or remain constant. It is stated that the mass of AgCl will increase due to the added ionized Cl interacting with the Ag(aq). However, there is confusion about whether the Cl(aq) will act with Ag(aq) to create a solid. The conversation
  • #1
gmunoz18
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a question on equillibria

"Ionic compounds we normally designate as insoluble in water e.g. AgCl actually dissocitae to a small extent into constituent ions. these aqueous ions are in equillibrium with the solid as indicated in the following equation

AgCl(s) [tex]\Updownarrow[/tex] Ag[tex]^{}_{}+[/tex] (aq) + Cl[tex]^{-}[/tex] (aq)

if a beaker of water containg solid silver chloride, indicate if the equillibrium components increase, decrease or do not change when a solution of NaCl is added to the beaker

Mass of AgCl(s): [tex]\uparrow[/tex] or[tex]\downarrow[/tex] or constant

Concentration of Ag(aq): [tex]\uparrow[/tex] or [tex]\downarrow[/tex] or constant

Concentration of Cl(aq): [tex]\uparrow[/tex] or [tex]\downarrow[/tex] or constant


I have put mass of AgCl increase because adding more ionized Cl will interact with the Ag(aq)


and if this was true Ag(aq) and Cl(aq) would decrease, right?

But my biggest concern is does the Cl(aq) act with Ag(aq) to create a solid; I am just not sure if my logic is correct

any feedback would be greatly appreciated
 
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  • #2
and i just read to not post questions here

So sorry
 
  • #3
It is the application of the Le Chatelier's principle, and you are right.

Question will be moved by mentors sooner or later to appropriate forum.
 
  • #4
Borek said:
It is the application of the Le Chatelier's principle, and you are right.

Question will be moved by mentors sooner or later to appropriate forum.

thank you for the prompt reply
 

1. What is chemical equilibrium?

Chemical equilibrium is a state in a reaction where the rate of the forward reaction is equal to the rate of the reverse reaction, resulting in no overall change in the concentrations of the reactants and products.

2. How is equilibrium affected by adding NaCl to a solution of AgCl?

Adding NaCl to a solution of AgCl will increase the concentration of chloride ions in the solution. This will cause a shift in the equilibrium towards the formation of more AgCl, as the increased concentration of chloride ions will favor the reverse reaction.

3. What is the Le Chatelier's principle and how does it apply to AgCl + NaCl equilibrium?

The Le Chatelier's principle states that when a system at equilibrium is subjected to a stress, the system will shift in a way that minimizes the effect of the stress. In the case of AgCl + NaCl equilibrium, adding more NaCl is a stress that will cause the system to shift towards the formation of more AgCl in order to minimize the increased concentration of chloride ions.

4. Can temperature changes affect the equilibrium between AgCl and NaCl?

Yes, temperature changes can affect the equilibrium between AgCl and NaCl. An increase in temperature will favor the endothermic reaction (formation of AgCl), while a decrease in temperature will favor the exothermic reaction (dissolution of AgCl).

5. How does the concentration of AgCl and NaCl affect the equilibrium constant for this reaction?

The equilibrium constant (K) for a reaction is a ratio of the concentrations of products to reactants at equilibrium. Therefore, changing the concentrations of AgCl and NaCl will also change the value of K. However, the equilibrium constant will remain the same at a given temperature, regardless of the initial concentrations of reactants and products.

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