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Unformatted text preview: CHM 2046/Myers Worksheet 21 February 26, 2010 1. Working T Shift Effects Which way is Better? Le Chatelier Reasoning or Using G = H - T S (using H only) (using H and S) It helps to express K in terms of H and S: K = exp - RT G = exp + - RT S T H = One gets slightly different answers for the case: H= + and S = - LCP Reasoning G = H - T S At Low T: At High T: 2. Metal Ion Q/R Effects. Metal ions with a large charge (Q), and/or a small radius (R), very strongly bond to Lewis bases. This principle applies to both ion-ion and ion-dipole attractions. One can understand and predict a lot of metal ion chemistry based the Q/R ratio . For this series of ions, Q/R increases from left to right: Na + , Ca +2 , Mg +2 , Al +3 . Q/R (in -1 ) = ____ ____ ____ ____ For this series, chemical properties vary in a regular manner, based on the Q/R....
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- Spring '07