Exset2 - Nielsen CHM1041 Exercise Set 2 1. Potassium iodide...

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Nielsen Bhaskar/PC/1714R/J 3/05 CHM1041 Exercise Set 2 1. Potassium iodide is more soluble in methyl alcohol, CH 3 OH, than in benzene, C 6 H 6 , whereas naphthalene, C 10 H 8 , is more soluble in benzene. Suggest explanations for both cases. 2. When a solid substance dissolves, two processes are of prime importance: the breaking way of particles from the solid and the joining of solute and solvent particles. In terms of these two processes, explain how the dissolving of sodium hydroxide can be exothermic, whereas for ammonium chloride the process is endothermic. 3. The lattice energy of KF is –804 KJ/mole. The heat of hydration of KF (infinite dilution) at 298°K is –819 KJ/mole. What is the heat of solution of KF for the preparation of very dilute solutions? 4. On the basis of size of charge (ionic charge density), choose the ion in each of the following pairs with the largest hydration energy (energy of salvation in H 2 O). a.
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This note was uploaded on 12/12/2011 for the course CHM 2041 taught by Professor Staff during the Fall '09 term at Santa Fe College.

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Exset2 - Nielsen CHM1041 Exercise Set 2 1. Potassium iodide...

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