Flashcards
Cfe Higher Chemistry - Unit 2: Nature's Chemistry - Esters, Fats and Oils
Flashcards do conjunto (17)
- 1How are Esters Formed?Condensation reaction between a carboxyllic acid and an alcohol
- 2How can you tell is an Ester has been made?An oily layer will have formed and an aroma let off
- 3How are esters prepared in the lab?In a water bath and using a condenser
- 4Why is the ester reaction heated using a water bath as opposed to an open flame?The alcohol used is flammable, this would be dangerous with an open flame
- 5What is produced upon the hydrolysis of an ester?a carboxyllic acid and an alcohol
- 6What are esters used for?fruit flavourings
non-polar industrial solvents - 7What are the three types of fats and oils? Give an example of each.Marine - blubber
Animal - goose fat
Vegetable - Olive oil - 8Why is there a difference in the melting point of fats and oils?Differing number of C=C bonds
- 9Which have a higher melting point, oils or fats?Fats, no C=C bonds
- 10Fat as an energy sourceSlow release energy
releases more energy per gram than carbohydrates
extra energy is stored as fat - 11Structure of fatOne mol of glycerol to 3 mols of fatty acid
- 12How are all fats and oils similar?They are all esters of the same alcohol
- 13What is this?Glycerol
- 14What is used to catalyse the hardening of oils?Nickel
- 15What is the hardening of oils?hydrogenating to reduce the number of C=C bonds, thus reducing the melting point and degree of saturation
- 16What is a saturated carboxyllic acid?Carboxyllic acid with no C=C bonds
- 17What is an unsaturated Carboxyllic acidCarboxyllic acid with C=C bonds
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- Cfe Higher Chemistry - Unit 2: Nature's Chemistry - Esters, Fats and Oils
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