Topic: Simple precipitation question? (Read 3120 times)

Stroodle · « **on:** March 17, 2010, 12:55:44 AM »

Hi there.

I'm just wanting to know the most important reason why barium chloride is chosen over lead chloride as the precipitation agent when trying to determine, by gravimetric analysis, how much sulfate is in a sample.

I think it's probably due to BaCl2 having a higher solubility, but I just want to confirm.
In the experiment the BaCl2 (or PbCl2) is added to a heated solution containing the sulfate ions.

Thanks!

Borek · « **Reply #1 on:** March 17, 2010, 03:59:55 AM »

Quote from: Stroodle on March 17, 2010, 12:55:44 AM

I think it's probably due to BaCl2 having a higher solubility

Higher or lower?

Stroodle · « **Reply #2 on:** March 17, 2010, 04:09:21 AM »

Quote from: Borek on March 17, 2010, 03:59:55 AM

Quote from: Stroodle on March 17, 2010, 12:55:44 AM
I think it's probably due to BaCl2 having a higher solubility

Higher or lower?

Is it lower? If it is then I don't have a clue why BaCl2 is used as the precipitation agent...

FreeTheBee · « **Reply #3 on:** March 17, 2010, 05:30:30 AM »

Perhaps, compare the solubilities of the two chlorides and the two sulphates.

Borek · « **Reply #4 on:** March 17, 2010, 05:44:14 AM »

:facepalm:

Topic: Simple precipitation question? (Read 3120 times)

Stroodle

Simple precipitation question?

Borek

Re: Simple precipitation question?

Stroodle

Re: Simple precipitation question?

FreeTheBee

Re: Simple precipitation question?

Borek

Re: Simple precipitation question?

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