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Edexcel IGCSE Chemistry Safe Experimental Methods

Practise Edexcel IGCSE Chemistry safe experimental methods by choosing apparatus, preventing splashes and explaining safety precautions.

Syllabus
Issue 3 (2024)
Course
Chemistry 4CH1

Exam points

  • Name suitable apparatus such as a conical flask or measuring cylinder for a practical method.
  • Explain containment choices such as a lid or cotton wool to reduce loss or splashing.
  • Link safety precautions to hazards, such as toxic chlorine, corrosive acid or flammable liquids.

Safe and appropriate experimental methods question 1

[Maximum number: 1]

A student uses this apparatus to investigate the rate of reaction between marble chips and dilute hydrochloric acid.

Figure for Question Safe and appropriate experimental methods question 1 — Edexcel IGCSE Chemistry

The equation for the reaction is

CaCO3+2HCl→CaCl2+H2O+CO2\mathrm{CaCO}_{3}+2 \mathrm{HCl} \rightarrow \mathrm{CaCl}_{2}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2}

During the reaction the mass of the contents of the flask decreases.

State the purpose of the cotton wool.

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