122ch13b_001

122ch13b_001 - 18 13.20) 19 13.22) 20 13.25) 21 13.25)...

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18 13.20)
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19 13.22)
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20 13.25)
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21 13.25) (cont.)
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22 13.25) (cont.)
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23 13.27) Remember, Like Dissolves Like Polar & ionic solutes dissolve in Polar solvents. Ex: NH 3 , CH 3 OH, CH 3 CH 2 OH, NaCl, etc. dissolve in H 2 O, NH 3 , CH 3 OH, CH 3 -C-CH 3 , etc. || O Non polar solutes dissolve in non polar solvents Ex: greases, oils, fats, hydrocarbons dissolve in nonpolar solvents (hydrocarbons such as benzene, C 6 H 6 , cyclohexane, C 6 H 12 , hexane, C 6 H 14 , toluene, C 7 H 8 , carbon tetrachloride, CCl 4 , etc.) For a solute to be appreciably soluble in a solvent they both must possess similar attractive forces. Then the energy required to separate solute particles and separate solvent particles will be comparable to the energy released when the solute-solvent attractions form. ˆ For appreciable solubility solute and solvent should have similar AF -“ Like Dissolves Like Hexane, C 6 H 14 , is a nonpolar solvent that has only LF. The more soluble solute will have AF that are most like those in hexane. You are breaking LF between the
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122ch13b_001 - 18 13.20) 19 13.22) 20 13.25) 21 13.25)...

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