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110131 - Ideal solution chemical potential(Chapter 5 p...

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1 CHM3400 - Lecture 11 Jan 31 Ideal solution, chemical potential (Chapter 5 p. 127-133) solubility partial molar quantities chemical potential Gibbs energy of mixing
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2 Structure in solution Example : protein structure in solution Structure is due to balance of intra molecular (e.g. alpha helices, beta sheets) and inter molecular interactions (e.g. solvent, salts.) Vastly more complex system than gases!!! Will revisit molecular structure in spectroscopy lectures (X-ray and NMR)
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3 Intermolecular interactions Many types of intermolecular forces (IMFs) can be distinguished:
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4 Solubility Rule of thumb: for solubility purposes, it is best when the IMFs of both solute and solvent are similar. “Like dissolves like” e.g. water and oil e.g. water and ethanol
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