Exam Board
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AQA Chemistry
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Specification Code
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8462
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Exam Board Website
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http://www.aqa.org.uk/subjects/science/gcse/chemistry-8462
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Textbook(s)
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AQA Chemistry: Third Edition (Fullick, Coates, Ryan) ISBN 978-0-19-835938-8
Also available electronically via the kerboodle portal: https://www.kerboodle.com/users/login
All students have a login provided by the school.
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Topic
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Assessment
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Term 1
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C4 Chemical calculation
In this topic, students will build upon their understanding of the structure of atoms and sub-atomic particles to understand relative atomic mass and relative formula mass. Students should be able to use relative atomic masses to calculate relative formula masses of compounds.
This is then related to the mole and Avogadro’s constant, and the relevant calculations introduced. Students should be able to use the equation number of moles = mass (g) / Ar and use moles to balance symbol equations and calculate reacting masses. Students will also learn how to calculate the percentage yield and percentage atom economy of a reaction.
Students will apply their understanding of relative atomic mass, relative formula mass, and moles to concentrations. All students should be able to carry out calculations with concentrations in g/dm3, and students should be able to work with concentrations in mol/dm3 and with calculating moles in gases. Students will also carry out a titration as part of the required practical, using their results to calculate the concentration of an unknown solution.
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