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Chapter 9C - Measuring the degree of unsaturation
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Total cards: 3•Content version: v4•Public deck•Updated: 8/1/2026
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#1
Front (Question)
How can the degree of unsaturation be quantified?
Back (Answer)
• using iodine • iodine adds across C=C bond in an addition reaction to produce a colourless compound • Each C=C requires one molecule of iodine
#2
Front (Question)
What is an Iodine number
Back (Answer)
mass of iodine that reacts w/ 100 grams of a compound
#3
Front (Question)
What can an iodine number indicate?
Back (Answer)
• Higher iodine number = high degree of unsaturation • viscosity - higher number = lower viscosity • C=C creates kinking in molecule decreasing strength of the intermolecular forces b/w molecules