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What are the solubility trends of oxides and hydroxides of group 2 elements? What is a barium meal? What is the test for sulfate ions? 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)
Slide 3 – How do the group 1 and group 2 oxides react with water? This is explained on this slide and students will be prompted to write general equations for these reactions
Slide 4 – review students’ answers on this slide
Slide 5 – trends in solubility, alkalinity and pH for group 2 hydroxides presented to students in picture form
Slide 6 – Introductory slide to some ‘cool chemistry’ of group 2 elements
Slide 7 – test for carbonate ions
Slide 8 – test for carbon dioxide (linked to carbonate ions)
Slide 9 – explanation of why calcium hydroxide turns cloudy in the presence of carbon dioxide
Slide 10 – usefulness of powdered calcium hydroxide to neutralise excess soil acidity
Slide 11 – a mnemonic is given to students to help them remember the solubility trends of sulfates and hydroxides of group 2 elements
Slide 12 – test for sulfate ions
Slide 13 – explanation of the importance of hydrochloric acid in the test for sulfates
Slide 14 – an image of an X-ray Barium meal
Slide 15 – information on the contents and chemistry of the Barium meal
Slides 16 – 23: Exam questions with mark scheme answers (included with the purchase of this resource)

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