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ZIMSEC A-Level Chemistry

6.1.7.1Chemical equilibria and factors affecting equilibrium

Chemical equilibria and factors affecting equilibrium in ZIMSEC A-Level Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
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Learning objectives

What the syllabus expects you to be able to do.

  1. 6.1.7.1.1Explain reversible reaction and dynamic equilibrium.
  2. 6.1.7.1.2State Le Chatelier's principle and use it to deduce the effects of changes in temperature, concentration or pressure on a system at equilibrium.

Lessons

  • Dynamic equilibrium and Le Chatelier's principle

    40 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Chemical equilibria and factors affecting equilibrium: sample question

1 mark

The equilibrium NX2OX4(g)⇌2 NOX2(g)\ce{N2O4(g) <=> 2NO2(g)} is set up in a sealed syringe; NX2OX4\ce{N2O4} is colourless and NOX2\ce{NO2} is brown. The forward reaction is endothermic. Which change moves the position of equilibrium to the right?

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