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Edexcel A-Level Chemistry AS 3 P1 Solving Practical Context Problems Questions

Practise Edexcel IAL Chemistry 3.P1 by interpreting practical observations and colour changes, then explaining how setup and material form affect experimental validity.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • interpret observations and colour changes in a practical investigation
  • explain how experimental setup and material form affect validity

Edexcel A-Level Chemistry AS 3 P1 Solving Practical Context Problems Questions question 1

[Maximum number: 1]

A group of students carried out a thermochemistry experiment to determine the relative atomic mass of a metal, M.

Procedure Step 1 Transfer 50.0 cm350.0 \mathrm{~cm}^{3} of a 1.35 moldm−31.35 \mathrm{~mol} \mathrm{dm}^{-3} solution of copper(II) sulfate to an expanded polystyrene cup placed in a glass beaker. Step 2 Weigh out, as accurately as possible, a known mass of the finely powdered metal M. Step 3 Measure the temperature of the copper(II) sulfate solution. Step 4 Quickly add all of the powdered metal, stir the mixture continuously and note the highest temperature reached.

Figure for Question Edexcel A-Level Chemistry AS 3 P1 Solving Practical Context Problems Questions question 1 — Edexcel A-Level Chemistry AS

Each student carried out the experiment using a different mass of the metal.

Powdered metal reacts much faster than filings or granules. Suggest why this is important in this experiment.

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