Edexcel IAL Chemistry 10.15 Alcohol nomenclature and formulae

Choose the longest chain containing OH, number to give hydroxyl groups the lowest locants and draw the exact formula style requested without changing connectivity.

Exam points

Name alcohols with the correct parent chain, OH locant, branches and diol or triol suffix.
Draw requested skeletal or displayed formulae for alcohol isomers from names or formulae.

[Maximum number: 2]

This is a question about alcohols.

(a)

Alcohols can be converted into halogenoalkanes.

[ 2 ]

(i)

Write the equation for the reaction between methanol, $\mathrm{CH}_{3} \mathrm{OH}$ , and phosphorus(V) chloride, $\mathrm{PCl}_{5}$ .

[ 1 ]

correct equation

Example of equation
$\mathrm{CH}_{3} \mathrm{OH}+\mathrm{PCl}_{5} \rightarrow \mathrm{CH}_{3} \mathrm{Cl}+\mathrm{POCl}_{3}+\mathrm{HCl}$

Allow multiples

Allow $\mathrm{PCl}_{3} \mathrm{O}$

Ignore state symbols even if incorrect

(1)

(ii)

State the observation that would be made from this reaction.

[ 1 ]

An answer that makes reference to the following point:

- steamy fumes / misty fumes / white fumes

Ignore effervescence / bubbles / gets hot / $\mathrm{PCl}_{5}$ dissolves

Do not award white smoke / additional incorrect observations

(1)

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10.17—The reactions of alcohols with: i oxygen in air (combustion) ii halogenating agents • PCl5 to produce chloroalkanes question 1

Question (a)

Question (i)

Question (ii)