CAIE A-Level Chemistry AS 22.2.1 Analyse Mass Spectra Questions

Practise CAIE 9701 mass spectra by matching m/e to ions, calculating isotope abundance and using linked peaks to identify elements or structures.

Exam points

identify an ion by matching its mass and charge to the observed m/e, including multiply charged ions
relate peak-height ratios to natural isotope abundances rather than to different ion stability alone
use linked isotope peaks and fragment evidence together when suggesting a molecular structure

[Maximum number: 1]

Copper is used in electrical equipment. It has a melting point of $1085^{\circ} \mathrm{C}$ .

The mass spectrum of a sample of pure copper is shown in Fig. 1.1.

Fig. 1.1

Identify the ion with an abundance of 23 % in the sample.

${ }^{63} \mathrm{Cu}^{2+}$

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