The equilibrium constant value is not affected by changes in concentration, pressure or catalyst, but is affected by temperature. All this and more covered in this comprehensive lesson with questions and answers! This is a Year 13 A level lesson for Edexcel International Unit 4 – WCH14, but it can also be used for all UK exam boards. All the slides in this lesson are fully animated and include answers to every mini plenary question and exam question. The breakdown of the slides (which are best opened on Microsoft PowerPoint) is as follows:

Slide 1 - Title and 5-minute starter. The starter is a grid of four questions entitled ‘last week, last lesson, today’s learning and future learning’. Use this generic slide for all your lessons by simply changing the questions and the answers each time.
Slide 2 - Lesson objectives (see thumbnail image)
Slide 3 – a Y12 recap word fill activity of what happens to a reaction at equilibrium when changes are made to temperature
Slide 4 – students are presented with data for varying temperatures and Kp values and prompted to explain the trend. Answers animate on the screen as you click
Slide 5 – students are presented with data for varying temperatures and Kp values and prompted to explain the trend. Answers animate on the screen as you click
Slides 6 – 7: Summary slides explaining what happens to equilibrium constants when temperature is changed
Slides 8 – 10: learning pit stop. A question about how temperature change affects Kp. Slides 9 – 10 are printout slides for the students
Slide 11 – this slide explains how changes in concentration affect the value of Kc. It is a fill-in-the-blanks slide to encourage students to think and to allow you to cold call students
Slides 12 – 15: this section focuses on changing pressure and how Kp remains constant using examples
Slide 16 – this slide explains the effect of a catalyst on equilibrium constant
Slides 17 – 26: Exam questions with mark scheme answers (included with the resource)

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