Common Ion Effect and Precipitation Flashcards

1
Q

What is precipitation?

A

o Precipitation is when a solid solute spontaneously forms from a solution

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2
Q

Describe the result when the Qsp > Ksp

A

precipitate will form

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3
Q

Describe the result when the Qsp < Ksp

A

no precipitate will form

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4
Q

What is a super-saturated solution?

A

 A solution with a concentration higher than the saturation concentration is called a super-saturated solution

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5
Q

Relate Qsp to Ksp when the system is at equilibrium

A

Qsp = Ksp

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6
Q

How do you make a super-saturated solution?

A

 Made by making a saturated solution at a higher temperature where the solubility is higher and then slowly cooling the solution to a lower temperature where the solubility is lower

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7
Q

What is the common ion effect?

A

o Because the solubility of an ionic compound depends on the product of the concentrations of the ions, this solubility can be greatly affected if there are already some of those ions present in the solution

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8
Q

Relate Qsp to Ksp when no precipitate will form

A

Qsp < Ksp

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9
Q

Relate Qsp to Ksp when precipitate will form

A

Qsp > Ksp

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10
Q

Describe the result when the Qsp = Ksp

A

the system is at equilibrium

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