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Flashcards do conjunto (20)
- 1What technique is used in the extraction of clove oil from cloves?Steam distillation
- 2Distinguish between a solvent and an emulsionA solvent is the substance in which the solute is dissolved.
An emulsion is a mixture of two or more liquids that are normally immiscible - 3What is the purpose of the safety tube?Ensures there is no build up of pressure in steam generator
- 4Why is the safety tube below the water?To ensure the steam travels through the apparatus instead of escaping into the air
- 5Why is the steam trap in place?It traps the steam that has condensed to water
- 6Why are whole cloves used instead of ground cloves?They contain the bud of the clove which is the part with the most oil
- 7Name the main constituent of the oilEugenol, C10H12O2
- 8Give two uses of clove oilFlavouring foods and to treat toothache
- 9Name the extraction process for the isolation of clove oil from waterLiquid-liquid extraction
- 10Give the purpose of the cyclohexaneit is used as a solvent
- 11Why is the tap of the separating funnel opened after shaking the funnel?To release the pressure of the vaporised liquid in the funnel
- 12How many washings are carried out?Three washing
- 13Describe the appearance of the emulsionMilky colour
- 14Why does the emulsion's appearance change?It changes as oil is being extracted from the emulsion by dissolving it in cyclohexane
- 15Why is magnesium sulphate used?It's a drying agent
- 16Give the formula of magnesium sulphateMgSO4
- 17How is the excess magnesium sulphate removed after?By filtration
- 18Clove oil solution is placed in a dry conical flask. Why is it placed in a water bath?A water bath is necessary as if a hot plate was used the clove oil could boil off as well as cyclohexane
- 19Is cyclohexane flammable?Yes it is flammable
- 20The quantity of oil produced in the experiment is.....very small
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- Fifth year Chemistry (Clove oil experiment) FlashCards sobre Questions, criado por Gemma Reilly em 02-12-2019.
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- Gemma Reilly
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