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Edexcel A-Level Chemistry AS 10.21 Interpret Data From Mass Spectra to Suggest Possible Structures of Simple Organic Compounds Using the M Z of the Molecular Questions

Identify each apparatus component and its purpose, use density to assign separating-funnel layers and connect every setup error to product loss, safety or measurement bias.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • Distinguish reflux from distillation and correct condenser, thermometer and receiver setup.
  • Assign aqueous and organic layers from density, then vent and drain a separating funnel safely.
  • Choose an anhydrous drying agent and use boiling temperature to judge product purity.

Edexcel A-Level Chemistry AS 10.21 Interpret Data From Mass Spectra to Suggest Possible Structures of Simple Organic Compounds Using the M Z of the Molecular Questions question 1

[Maximum number: 2]

Terpenes and terpenoids are groups of chemicals found in plants.
They contribute to the smell and taste of the plant, and so are used in flavourings and perfumes.

Both terpenes and terpenoids have carbon skeletons based on one or more units of the compound isoprene.

Figure for Question Edexcel A-Level Chemistry AS 10.21 Interpret Data From Mass Spectra to Suggest Possible Structures of Simple Organic Compounds Using the M Z of the Molecular Questions question 1 — Edexcel A-Level Chemistry AS

isoprene
Terpenes are made up of two or more isoprene units joined together, while terpenoids have additional functional groups, often containing oxygen.

Limonene and myrcene are both terpenes composed of two isoprene units.
Menthol, linalool and citronellol are terpenoids containing an - OH group.

The peaks with the highest intensity in the mass spectrum of isoprene are at m / z=68 and m / z=53.
Identify the species responsible for these two peaks.
m / z=68

m / z=53
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