notes06-07-page174

notes06-07-page174 - Substituting the expression for salt...

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Substituting the expression for μ salt into this gives ln a salt = v + μ + v μ + v + μ ª + v μ ª RT (23.5) = v + μ + v + μ ª + RT | {z } v + ln a + + v μ v μ ª RT | {z } v ln a So, ln a salt = v + ln a + + v ln a (23.6) or, alternatively, a salt = a v + a v (23.7) It is the case that 1 mole of salt behaves like v = v + + v moles of nonelectrolytes in terms of the colligative properties. This suggests that the interesting quantity is μ salt v : μ salt v = μ ª salt v + RT ln a 1 /v salt . (23.8) We see that a 1 /v salt =( a v + a v ) 1 /v a ± .
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