An aqueous solution contains .15 M Cl and .45 MT. A chemist wishes to do a fractional precipitation experiment in which he slowly adds Pb²*, which can form ppts of PbCl2 (s) [Ksp = 1.6 x 10-5] and Pbl2 (s) [Ksp = 8.4 x 10°]. Which of the following is entirely correct? Pb2+

Fundamentals Of Analytical Chemistry
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Chapter20: Applications Of Oxidation/reduction Titrations
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Problem 20.4QAP
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An aqueous solution contains .15 M
Cl* and .45 MT. A chemist wishes to
do a fractional
precipitation experiment in which he
slowly adds Pb²*, which can form
ppts of
PbCl2 (s) [Ksp = 1.6 x 10-5] and Pbl2
(s) [Ksp = 8.4 x 10°]. Which of the
following
is entirely correct?
Pb2+
.15 M
.45 M
CI-
I-
Transcribed Image Text:An aqueous solution contains .15 M Cl* and .45 MT. A chemist wishes to do a fractional precipitation experiment in which he slowly adds Pb²*, which can form ppts of PbCl2 (s) [Ksp = 1.6 x 10-5] and Pbl2 (s) [Ksp = 8.4 x 10°]. Which of the following is entirely correct? Pb2+ .15 M .45 M CI- I-
Ol precipitates first when [Pb2+]
7.9 x 10-5 M
O Cl' precipitates first when [Pb2+] =
7.1 x 10-4 M
Ol precipitates first when [Pb²*] =
4.1 x 108 M
O CI precipitates first when [Pb2*]
1.1 x 10-4 M
%D
Ol precipitates fırst when [Pb2+] =
1.0 х 108 М
Transcribed Image Text:Ol precipitates first when [Pb2+] 7.9 x 10-5 M O Cl' precipitates first when [Pb2+] = 7.1 x 10-4 M Ol precipitates first when [Pb²*] = 4.1 x 108 M O CI precipitates first when [Pb2*] 1.1 x 10-4 M %D Ol precipitates fırst when [Pb2+] = 1.0 х 108 М
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