Jenn G.

asked • 04/08/21

A solution equilibrium exists with the equation AgCl(s)⇌Ag+1(aq) + Cl-1(aq) and NaCl is added to the system. What happens when the NaCl is added?

A solution equilibrium exists with the equation AgCl(s)⇌Ag+1(aq) + Cl-1(aq) and NaCl is added to the system. What happens when the NaCl is added?

a) Equilibrium will shift to the right and more AgBr will dissolve

b) Equilibrium will shift to the left and more AgBr will dissolve

c) Equilibrium will shift to the right and more AgBr will precipitate

d) Equilibrium will shift to the left and more AgBr will precipitate

1 Expert Answer

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J.R. S. answered • 04/08/21

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Because you have Cl- ions on the right side of the equation, adding NaCl, and thereby adding Cl- ions, you will shift the reaction to the left according to LeChatelier. So, (d) would be the correct answer if you change AgBr to AgCl, since there is no AgBr in the equation.

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Jenn G.

Thanks :) Also why doesn't the NaCI add to the left side of the equation and add to AgCl?
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04/11/21

J.R. S.

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There is no effect on the concentration of the AgCl by the addition of NaCl because AgCl is present as a SOLID, and the concentration of solids is considered to be a value of 1. We don't include solids and liquids when we write the equilibrium equation.
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04/11/21

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