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A-LEVEL ORGANIC CHEMISTRY SUMMARY NOTES: ALCOHOL $9.53   Add to cart

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A-LEVEL ORGANIC CHEMISTRY SUMMARY NOTES: ALCOHOL

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Summary Cheat Sheet Perfect for last-minute review or ongoing study, these notes are your key to mastering the course and achieving excellence in your exams. They cover all the key concepts, formulas, and methodologies you need to know. Concise Summaries and Key Formulas: includes clear ...

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  • August 14, 2024
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Available practice questions

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Some examples from this set of practice questions

1.

What is the alcohol functional group?

Answer: R-OH

2.

Explain the solubility of alcohols

Answer: Alcohol –OH group has ability to form hydrogen bonds with water molecules

3.

Explain the relatively low volatility of alcohols compared with alkanes

Answer: Alcohol molecules are able to hydrogen bond between each other Alkanes only have London Forces Hydrogen bonding is stronger than London Forces therefore requires more energy to overcome

4.

Outline the different classifications of alcohols

Answer: Classification is determined by the number of alkyl groups bonded to the carbon of the hydroxyl group

5.

What are the different reactions alcohols can undergo

Answer: Combustion Oxidation with an oxidising agent Elimination of H2O reactions with acid catalysts Substitution with halide ions in the presence of acid

6.

What are the 2 products of complete combustion of an alcohol

Answer: Carbon dioxide and water (vapour)

7.

Definition of an oxidising agent

Answer: A substance that causes the oxidation (gain of oxygen, loss of hydrogen or loss of electrons) by being reduced (losing oxygen, gaining hydrogen or gaining electrons) itself

8.

Give the name and formulae of the oxidising agent used for oxidising alcohols

Answer: Acidified potassium (or sodium) dichromate H2SO4 / K2Cr2O7 Acid usually conc.

9.

What is the expected colour change when acidified potassium dichromate oxidises an alcohol

Answer: Orange to green

10.

Explain why distillation is used to form an aldehyde when oxidising a primary alcohol

Answer: Aldehydes cannot form hydrogen bonds and therefore have a lower boiling point than alcohols Therefore once formed, the aldehyde quickly boils and is separated from the oxidising agent before further oxidation can take place

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