Asked by Hank

If I had a question about complex ions and the problem had a "mixture" of two compounds, how would I know if one of the products formed is going to be a solid or liquid?

I know there are solubility rules, but is there something else you can use to tell?
Answered by Hank
Equilibria* (complex ions Equilibria)
Answered by Morgan
The solvability rules is your best bet with this type of situation. You could always google the product to read about its state at normal temperatures and pressures.

Would you like me to give you the solvability rules?
Answered by DrBob222
Or post the two and see if we know.
Answered by Hank
If I was taking an exam and I had no solubility rules given...
Answered by Hank
I.e Pb(NO3)2+NaI==> PbI2 + NaNO3
I know NO3 will dissolve in water, but if I didn't know if PbI2 was solid or aqueous, how would i figure that out?

and Al(3+)+ 6F- ===> [AlF6]^3- (aq)
Answered by DrBob222
There is no way out of memorizing the solubility rules for things like PbI2, PbSO4, BaSO4, CuI, etc. You can Google solubility rules and look for the one you like best. I always told my students to memorize them. Frankly, I never did BUT I used them so often when I was in high school and undergraduate school that I ended up "just knowing them" which I guess the purist would say was memorizing them. I've been at this now for about 70 years and one pops up now and then I'm not sure about but those won't show up for you at this stage of the game. For complex ions, I wouldn't swear this would ALWAYS ALWAYS ALWAYS be right but most complex ions are soluble and liquid in water solution.
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