NEW AQA 9-1 Topic 3 moles and reacting mass calculations

A lesson/ series of lessons looking at what is meant by the term ‘mole’, how to calculate the number of moles of a substance, how to rearrange the moles equation to calculate mass or Mr and how to find missing masses from balanced symbol equations using molar ratios. The powerpoint features a lot of step-by-step worked examples and plenty of opportunity for student practice with questions that progress from simple to more complex examples alongside animated answers. Lesson features include:

• A 10 question starter quiz based on previous learning with animated answers (questions based on Topic 1, 2 and 3 to assist with long term memory retrieval)
• Slides discussing the difference between mass and moles together with an analogy of comparing the term moles to other words used to represent amounts in society - what is meant by a dozen, a century etc.
• A link to an engaging video comparing the number of atom to objects in our universe.
• Slides discussing the link between moles, mass and Mr alongside questions involving calculating the moles, mass and Mr of a substance. Students are shown how to rearrange the moles equation. Following this worked examples for calculating moles, mass and Mr are then shared on a split board with practice questions next to the worked examples for students to complete. Answers for these questions are animated to allow for student self-assessment.
• Slides guiding pupils on how to work out the missing mass of a substance using a balanced symbol equation. A method is shared with pupils to tackle these complex questions with 2 animated examples illustrating step-by-step how to follow the method. Numerous examples are then given for pupils to complete, initially using 1:1 ratios before looking at more complex ratios. All practice questions have full animated answers for student self-assessment
• A review task containing 6 questions on calculating missing masses in chemical reactions with animated answers
• A potential homework sheet with questions on calculating moles and rearranging the moles equation to calculate mass.