Waec Model Questions Vol1 2023 Chemistry Question 1

Practice practical question 1 from the 2023 Waec Model Questions Vol1 Chemistry examination. This question covers Atomic Structure .

Waec Model Questions Vol1 2023 Chemistry Practical

Topic: Atomic Structure

Question 1 WAEC_MODEL_QUESTIONS_VOL1 • 2023 • CHEMISTRY • practical

A mass spectrometer was used to analyse a sample of chlorine gas. The instrument gave the following relative ion‑current intensities for the two isotopic peaks observed. | Isotope | Relative intensity (arbitrary units) | |---------|--------------------------------------| | ³⁵Cl | 3000 | | ³⁷Cl | 1000 | Using this data, answer the questions below.

Question Parts

( a )

Calculate the relative atomic mass of chlorine from the data obtained.

( b )

The accepted natural isotopic abundances of ³⁵Cl and ³⁷Cl are 75.78 % and 24.22 % respectively. Discuss one possible source of error that could have caused the observed intensity ratio to differ from the natural abundance.

( c )

Suggest one procedural improvement to the experiment that could reduce the error identified in part (b).

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About This Question

This is Waec Model Questions Vol1 2023 Chemistry Question 1. It is one of the practical questions from the 2023 Waec Model Questions Vol1 Chemistry examination.

The question covers Atomic Structure .

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