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Topic: qualitative analysis  (Read 7806 times)

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Offline atomicserg

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qualitative analysis
« on: December 11, 2007, 09:07:43 PM »
in qualitative analysis, Ag+, Hg2 2+, and Pb 2+ are separated from other cations by addition of HCl.  calculate the concentration of Cl- required to just begin precipitation of
a.  AgCl
b.  Hg2Cl2
C.  PbCl2

in a solution having metal ion concentrations of .030M  what fraction of Pb 2+ remains in the solution when Ag just begins to precipitate

WHERE DO I START?
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Offline sondakem

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Re: qualitative analysis
« Reply #1 on: December 12, 2007, 10:26:50 AM »
Well, certainly you need ksp for each.

The most insoluble will start to ppt first.

How much Cl do I need to just see an AgCl ppt?  What is the Pb conc remaining at that Cl conc?
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Offline AWK

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Re: qualitative analysis
« Reply #2 on: December 12, 2007, 11:14:03 AM »
Quote
WHERE DO I START?

The lowest solubility shows Hg2Cl2
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Offline kalamari

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Re: qualitative analysis
« Reply #3 on: September 23, 2008, 07:56:46 PM »
How many Chemical Equations should ideally be used to solve the qualitative equations?

i have been told only n=m/M, C=n/V, empirical formula, percentage composition and water of crystallisation calculations.

is there any others i need to know??
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Offline Borek

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Re: qualitative analysis
« Reply #4 on: September 24, 2008, 02:44:12 AM »
Please don't hijack threads.

Please elaborate - what do you mean by

Quote from: kalamari on September 23, 2008, 07:56:46 PM
solve the qualitative equations?
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