Solution Formation. Solutions. . . . the components of a mixture are uniformly intermingled (the mixture is homogeneous ). Solution Components. Solute Solvent. Steps in Solution Formation. Step 1 - Expanding the solute (endothermic, ∆H 1 )
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. . . the components of a mixture are uniformly intermingled (the mixture is homogeneous).
Step 1 - Expanding the solute (endothermic, ∆H1)
Step 2 - Expanding the solvent (endothermic, ∆H2)
Step 3 - Allowing the solute and solvent to interact to form a solution (exothermic, ∆H3)
*(H-bonds = strong dipole)
Solution formation can be considered to take place in three steps:
DHsoln = DH1 + DH2 + DH3
For dissolving to occur, the magnitudes of DH1 + DH2 and of DH3 must be roughly comparable.
Two substances with similar intermolecular forces are likely to be soluble in each other.