GC problem

[DrRoyal Pains]

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Hey guys, I have a question regarding this problem :What is the maximum concentration of fluoride ions that could be present in 0.032M Ba(NO3)2 (Ksp,BaF2 = 3.2x10^-8)?
I understand how to work it out, but I am confused on the Ksp expression. Why is it not Ksp = [x][2x]^2? Is it because you are solving for F, and technically you don't know what "[2x]" is?

 

[kevinrho]

http://www. .com/showthread.php?3846-Confused-with-quiz-question&highlight=solubility

course saver between...... www. and .com

chad explains it here...

edit: here's another one..... i think it makes a little more sense

http://www. r.com/showthread.php?3721-General-Chemistry-quiz-video-5-03&highlight=solubility

 

[DrRoyal Pains]

Sweet. Thanks buddy 👍