Whena saturate solution of LiCl was chilled someof the solid solute formed LiCl

Question

Whena saturate solution of LiCl was chilled someof the solid solute formed

LiCl (s)---- Li + (aq) + Cl - (aq)

a) The stress placed on the system was ( an increase/ a decrease) intemperature

b) The system response wasan attempt to ( increase / decrease) the temperature

c) As a result the equilibrium shifted to the ( right / left) and the solubility of LiCl ( increase / decrease )

d) At the lower temperature the solution of LiCl was

1) unsaturated     2) Saturated     3) Supersaturated      4) Not enought information given

Explain please!

Explanation / Answer

a) The stress placed on the system was a decrease in temperature.

b) The system response was an attempt to decrease the temperature.

c) As a result the equilibrium shifted to the left and the solubility of LiCl decrease.

d) At the lower temperature the solution of LiCl was Supersaturated

Unsaturated solution : the solution in a position to dissolve some more amount of solute in it.

Saturated solution : in a solution very small amount of solute is un dissolved.No more amount of solute is not dissolved further.

Super saturated solution : Supersaturation is a state of a solution that contains more of the dissolved material than could be dissolved by the solvent under normal circumstances.if temperature decreases some amount of material will precipitate.

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