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Topic: PLEASE I need help !!precipitation problem (acid-base)  (Read 2490 times)

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Offline hawers

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PLEASE I need help !!precipitation problem (acid-base)
« on: April 05, 2011, 04:04:05 PM »
there is a solution which includes [H+]=0.3M, [Fe+2]=0.05M and [Pb+2]=0.05M and that this solution is saturated with H2S (means you take value [H2S]= 0.1M)
determine  PbS or FeS precipitation???
Ksp(PbS)=7x10*-29
Ksp(FeS)=4x10*-19
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Offline DevaDevil

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Re: PLEASE I need help !!precipitation problem (acid-base)
« Reply #1 on: April 05, 2011, 04:49:51 PM »
what do these Ksp values mean? This will tell you which will precipitate
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Offline hawers

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Re: PLEASE I need help !!precipitation problem (acid-base)
« Reply #2 on: April 05, 2011, 05:30:25 PM »
Quote from: DevaDevil on April 05, 2011, 04:49:51 PM
what do these Ksp values mean? This will tell you which will precipitate
Ksp means solubility product constant
and ı couldn't understand you exactly ?
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Offline DevaDevil

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Re: PLEASE I need help !!precipitation problem (acid-base)
« Reply #3 on: April 05, 2011, 05:37:25 PM »
in mathematical form:

Ksp (PbS) = .

do you know this?
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