CHEM 250 Lecture Notes - Lecture 22: Carboxylic Acid, Triglyceride, Glycolipid

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1 May 2020

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Store energy with fat cells (cid:8869) plants : starch (cid:8869) animals : fat family of substances that are insoluble in water but soluble in non - polar solvents and solvents of low polarity energy fat - Part of membranes that separate compartments of aqueous solutions from each other. Complex lipids : phospholipids , sphingo lipids and glycolipids. Try, glycerides (cid:8869) glycerol + long-chain fatty acids o. Ch z - ocr ( hz - oh l. Chz - oh l: hz - oh glycerol. Rcooh : fatty acids (cid:8869) unbranched (cid:8869) range from 10 - 20 carbons (cid:8869) even number (cid:8869) no functional group except for double bonds (cid:8869) cis isomers predominate. Chz - 0433 no most common lipid materials. Fats ( animals ) : solid , contains mainly saturated fatty acids. Oils (plants) : liquid , contains mainly unsaturated fatty acids.

Related Questions

A textbook on chemical thermodynamics states, “The heat of solution represents the difference between the lattice energy of the crystalline solid and the solvation energy of the gaseous ions.” (a) Draw a simple energy diagram to illustrate this statement. (b) A salt such as NaBr is insoluble in most polar nonaqueous solvents such as acetonitrile (CH₃CN) or nitromethane (CH₃NO₂), but salts of large cations, such as tetramethylammonium bromide [(CH₃)₄NBr], are generally more soluble. Use the thermochemical cycle you drew in part (a) and the factors that determine the lattice energy (Section 8.2) to explain this fact.

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Select the most appropriate explanation of the followingobservation on solubility: "Hydrogen chloride, HCl, is very solublein water."

Water is a polar solvent, and it promotes the ionization of manypolar molecules.

Opposites attract, that is, polar solutes dissolve in non-polarsolvents and vice-versa.

Water promotes the dissociation of many ionic solids.

Gases that interact only slightly with solvents dissolvefreely.

Relatively light molecules are generally more soluble in water thanheavier molecules.

CHEM 250 Lecture Notes - Lecture 22: Carboxylic Acid, Triglyceride, Glycolipid

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