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www.saplinglearning www.saplinglearning x Search Q&A; Chegg Y What is the molar so x Wilfrid Laurier Unive x /ibiscms/mood/ibis/view.php?id-178903 WWW. Saplinglea ning-ca Sapling Learning Wilfrid La Activities and Due Dates Ch7 (Activity ity CHEM 26 ROBOKOV My Assignment 10/23/2015 11:55 PM A 78.2/100 23/2015 10:04 AM Gradebook Attempts score Print Calculator 98 Questi Given the following equilibrium 96 +2Br (aq) K, 2.10 x 10 Determine the concentrations of Pb2 and Br in a saturated solution of PbBrz in a) pure water (assume u 0) 98 Pb 98 Number trength 0.010. Number 93 Pb 93 Scroll down be sure to answer parts a), b), and c) 99 Check Answer Next Exit Pr Up & Vi ight 20 Resources Assignment Information Available From: Not Set 10/23/2015 11:55 PM Due Date: Points Possible: 100 Grade Category: Graded Description: Policies: Homework can check your answ up on any question You can keep trying to answer each question until you get it right or give up 5% O eTextbook O Help With This Topic Web Help & Videos O Technical Support and Bug Report Customize Logo ENG 8:39 PM US 2015-10-23

Explanation / Answer

PbBr2 ------> Pb2+ + 2Br-

Ksp = [Pb2+][Br-]2

        = x * (2x)2 = 2.1 *10-6

x = 0.8 *10-2

[Pb^2+] = 0.008 M

[Br^-1] = 2*0.008 = 0.016 M

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Ionic strength = 0.01

1/2(x*22 + 2x* 12) = 0.01

x = 3.33 *10-3

[Pb 2+] = 3.33 *10-3 M

[Br-] = 6.66 *10-3

Pb2+ 2Br- Initial 0 0 change +x +2x equilibrium +x +2x

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