51ºÚÁÏ

Why don’t alkanes dissolve in water? Why don’t halogenoalkanes dissolve in water? What is the like-dissolves-like rule? How does salt dissolve in water? All this and more covered in this comprehensive lesson with questions and answers! This is a Year 12 A level lesson for Edexcel International Unit 2 – WCH12, 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 of your lessons by simply changing the questions and the answers each time.
Slide 2 - Lesson objectives (see thumbnail image)
Slides 3 – 5: A joke about polar bears to drive home the important, rule-of-thumb: like dissolves like
Slides 6 – 10: Explanation of how water dissolves ionic solids, including ion-dipole interactions, hydration, etc.
Slides 11 – 13: Explanation of how alcohols like ethanol dissolve in water
Slide 14 - learning pit-stop to check students’ learning. A series of questions of increasing difficulty, with the stretch and challenge (S+C) being the hardest. Answers animate onto the screen when you click
Slides 15 – 18: Explanation of why non-polar substances, like alkanes, do not dissolve in water
Slides 19 – 20: Explanation of why halogenoalkanes like chloroethane, which are polar, are still insoluble in water
Slides 21 – 26: A recap of why some ionic compounds and alcohols are soluble, and why non-polar substances are insoluble
Slides 27 – 32: Exam questions with mark scheme answers (included with the purchase of this resource)

If you have a positive experience with the resource, please leave a positive review! This really helps promote our store! Thanks!