Gen chem Question from barrons DAT

[Potatochips]

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The barrons DAT prep book says

"The ion product is the product of the concentrations of the dissolved ions, each raised to its stoichiometric coefficient"

Ion product (Q) < Ksp Unsaturated No precipitation will form
Ion product (Q) = Ksp Saturated No precipitation will form
Ion product (Q) > Ksp Unsaturated Precipitation occurs


When Q value exceeds Ksp, it forms precipitation. Isn't formation of precipitation refers that solution is already saturated? I was just skimming through and somehow I got confused.

 

[LaughingGas]

The barrons DAT prep book says

"The ion product is the product of the concentrations of the dissolved ions, each raised to its stoichiometric coefficient"

Ion product (Q) < Ksp Unsaturated No precipitation will form
Ion product (Q) = Ksp Saturated No precipitation will form
Ion product (Q) > Ksp Unsaturated Precipitation occurs


When Q value exceeds Ksp, it forms precipitation. Isn't formation of precipitation refers that solution is already saturated? I was just skimming through and somehow I got confused.

This might be sort of irrelevant answer, but people suggested to not use Brrons DAT b/c it has too much errors. And I believe its saturated as you mentioned.