Transcription of Problem Set #12, Chem 340, Fall 2013
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Problem Set #12, Chem 340, Fall 2013
Problem Set #12, Chem 340, Fall 2013 Due Wednesday, Dec 4, 2013 Please show all work for credit To hand in: Ionic equilibria: 1. Calculate the value of m in 10 4 molal solutions of (a) KCl, (b) Ca(NO3) 2, and (c) ZnSO4. Assume complete dissociation. a) KCl 141== 10 mol kgvvvmv vmmm b) Ca(NO3)2 111414133== 10 mol 10 mol kgvvvmv vmmm c) ZnSO4 11412== 10 mol kgvvvmv vmmm 2. Calculate , and a for a m solution of K4Fe(CN) 6 at 298 K. 22221211111411512214 mol mol mol mol mol kg0vvvmIv zv zm zm zIIzzmv vmmam.
Debye–Hückel limiting law. (b) Calculate the degree of dissociation for a 0.0825 m solution of this acid that is also 0.022 m in KCl using the Debye–Hückel limiting law. a) K a = 1.38 10 –3 0.0825 m 22 1.38 10 3 a 0.0825 mm m K mm when = 1
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