Fats & Fixed Oils & Fatty Substances Flashcards
Value or number of physical and chemical property. Correctness of these values determines the quality of substances judged.
Constant
The _______ of fixed oils, fats, waxes, resins, etc. CANNOT be ascertained by the usual methods based on gravimetric or volumetric processes → by determination of constants,
purity
Fats are compounds consisting of fatty acids combined with ________ via ester linkages.
glycerol
An ESTER derived from glycerol and three fatty acids.
Triglycerides
Enumerate Some Common Fatty Acids
Butyric - 4C chain
Caproic - 6C chain
Caprylic - 8C chain
Capric - 10C chain
These are mixture of glyceryl esters of high molecular weight fatty acids like palmitic (16), stearic (18) and oleic(18) acids.
Fixed oils and Fats
Fixed oils contain relatively high quantities of liquid glycerides (_______________).
glyceryl oleate
Fats contain large amounts of solid glycerides (_____________).
glyceryl stearate
Are esters of high molecular weight monohydric alcohols and high molecular weight fatty acids.
Waxes
Fats and oils are made from glycerol and three fatty acids joined by?
dehydration synthesis
Fats and oils maybe saponified by means of either aqueous or ________ alkali.
alcoholic
Waxes are (low/high) melting point solids and have long alcohols chain.
low
Waxes are only saponified by alcoholic alkali.
TRUE
Are natural or induced solid or semi-solid exudates from plants characterized by being insoluble in water, soluble in alcohol and ether, crystallizable and softening or melting at a moderate heat.
Resins
Are substances containing benzoic or cinnamic acids or esters of these.
Balsams
