GCSE Chemistry, Unit 11, Lesson 6 of 6
Brainlag Plus

Required practicals review

GCSE Chemistry, Required practicals and maths skills, 20 minutes

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What each required practical measures, hazards and control measures, improving methods and planning.

The practicals at a glance

  • Making a soluble salt, titration, electrolysis, temperature change, rates (two ways), chromatography, identifying ions, water purification.
  • For each one, know: what you change, what you measure, what you keep the same, the main source of error, and one hazard with its control.

Improving an experiment usually means removing a source of error you can name, not "doing it more carefully".

The rest of this lesson and its 10 practice questions are in Plus.

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  • 10 exam-style questions, marked as you go, each with a worked solution
  • Anything you get wrong is saved to your flashcards