Quick Solubility Question!!!

[docjolly]

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Hi Everyone,

Could you please explain the answer to the question below to me??? I always get stumped with solubility questions...

Which of the following substances is most likely to be more soluble in 1M HCl than in 1M NaOH?

a.AgCl
b.Pb(OH)2
c. CaF2
d. HI

The correct answer is B. 😕

But, I chose a different answer.. I thought that, with respect to solubility, like dissolves like?? I thought that since HCl is acidic, it would be most soluble in an acidic solvent. So, why is B the correct answer??? Maybe I'm just confused.

I'd appreciate your help! Thanks a million 🙂

 

[SanDiegoSOD]

Like dissolves like does not apply here. That phrase is used to differentiated polar and non-polar substances. You need to look up your solubility rules and memorize them for the MCAT. Good luck

 

[liverotcod]

Common ion effect of the hydroxide in sodium hydroxide would reduce the solubility of lead hydroxide.

 

[safrat]

dude, like dissolve like applies to polar vs nonpolar molecules. Not acidic vs basic. I you have an acid and you dump more acid into it, then due to the common ion effect the acid you just poured will not dissolve as much. However, if you dumped a base into it, then it would completely dissolve releasing energy.

 

[docjolly]

Ouch! Silly me..I'm having information overload right now and am not paying attention to impt. distinctions with solubility rules..Sorry 🙁 I obviously need to review this stuff to make sure I really understand what's going on....

Nevertheless, thanks safrat, liverotcod, and sandiegosod for your help 🙂