Precipitation occurs when the ion product is greater than the Ksp. WHAT?

[Member 8586]

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A cation and an anion will precipitate when their ion product is greater than their Ksp. Precipitation occurs when the ion product is greater than the Ksp. Below this point, the ions will remain in solution. The Ksp is unique for each salt precipitate. Catalysis does not aid precipitation

can someone expand upon this...not sure what theyre really talking about at all...and what do they mean by "ion product?"

 

[Mich17]

The ion product is the same thing as Q. So when Q>Ksp there will be precipitate in the solution.

 

[Member 8586]

The ion product is the same thing as Q. So when Q>Ksp there will be precipitate in the solution.

um whats Q? lol

 

[Mich17]

Qsp= cation concentration * anion concentration
or more simply:
Qsp= [cation][anion]

 

[Flapjacks]

NaCl 's ion products are Na+ and Cl-. These have unique Ksp's and when their concentrations are higher than the Ksp for each respective ion product, they will precipitate.

 

[Bis-GMA111]

ksp is a measure of solubility (how well a compound dissolves). if you recall from chem lab, precipitate is the material that sinks to the bottom of a flask after mixing..when you have a higher ion concentration than what is dissolved in solution you will have precipitate.

 

[Member 8586]

Qsp= cation concentration * anion concentration
or more simply:
Qsp= [cation][anion]

NaCl 's ion products are Na+ and Cl-. These have unique Ksp's and when their concentrations are higher than the Ksp for each respective ion product, they will precipitate.

ksp is a measure of solubility (how well a compound dissolves). if you recall from chem lab, precipitate is the material that sinks to the bottom of a flask after mixing..when you have a higher ion concentration than what is dissolved in solution you will have precipitate.

thanks!! i dont think i ever came across "ion products" before..i got the answer right based on basically what just sounded right but wasnt sure how...makes a lot more sense now

 

[MuskieMan33]

I just watched Chad's video on this today. He makes it so much easier than my professor did last year! I got excited to answer it because its fresh in my head, but everyone else beat me to it. 🙁