EDEXCEL GCSE Chemistry Unit C3 Chemistry in action
Chemistry Unit C3 Topic 4 Gases, equilibria and ammonia
4.1 HT only: Be able to demonstrate an understanding that one mole of any gas occupies 24dm3 at
room temperature and atmospheric pressure and that this is known as the molar
volume of the gas.
4.2 HT only: Be able to use molar volume and balanced equations in calculations
involving the masses of solids and volumes of gases.
4.3 HT only: Be able to use Avogadro’s law to
calculate volumes of gases involved in gaseous reactions, given the relevant
4.4 Recall that nitrogenous fertilisers are manufactured from ammonia
and that they promote plant growth.
4.5 Be able to demonstrate an understanding of the
environmental consequences of the over-use of fertilisers, including excessive
plant growth in rivers and lakes.
4.6 Know that chemical reactions are
reversible and that the Haber process uses a reversible reaction between
nitrogen (extracted from the air) and hydrogen (obtained from natural gas) to
4.7 HT only: Be able to demonstrate an understanding of the concept of dynamic
4.8 HT only: Be able to explain how the position of a dynamic equilibrium is affected by
4.9 HT only: Be able to demonstrate an understanding of the consequential effects of these
changes on the rate of attainment of equilibrium and of the need to use a
4.10 HT only: Be able to describe how, in industrial reactions such as the Haber process,
the temperature, pressure and catalyst used produce an acceptable yield in an
Revision Notes and Quizzes to
help you revise
Edexcel GCSE CHEMISTRY
When revising, these pages
provide you with a summary of what you need to know and be able to do.
BUT remember, your primary
source of revision are your class notes, investigations and Edexcel GCSE