Equilibria – pupil resources

This collection of classroom resources features all the pupil activities from our Developing expertise in teaching equilibria course for teachers. This collection is most valuable to those who have attended this course and wish to put into practice with their students some of the ideas and activities presented as part of that event.


Ball balance

Equilibria

This programme is designed to develop students understanding through basic concepts such as reversible and irreversible reaction, looking at both physical and chemical changes, to dynamic equilibria and factors that affect equilibria. Working through the activities will also develop thinking and research skills.

Image

Rates and equilibria

This activity demonstrates the links between the topics of rates of reaction and the equilibrium law. It provides students with an explanation of the equilibrium law and helps them explain why Le Chatelier’s principle works for temperature, concentration and pressure.

Image

AfL: Equilibrium reactions

Assessment for Learning is an effective way of actively involving students in their learning.  Each session plan comes with suggestions about how to organise activities and worksheets that may be used with students.

Image

Distribution of iodine between two immiscible solvents

In association with

Using iodine crystals dissolved in equal volumes of two immiscible solvents, students can create an equilibrium distribution.

Image

Measuring an equilibrium constant on a microscale

Use your microscale titration apparatus to determine the equilibrium constant for the reaction between silver(I) and iron(II) ions

Image

Le Chatelier's principle: the effect of concentration on equilibrium

In association with

The reversible reaction between bismuth(III) oxychloride and bismuth(III) chloride is demonstrated in this experiment.

Image

Le Chatelier's principle: the effect of concentration and temperature on an equilibrium

In association with

Changing the chlorine concentration or temperature in this reaction shifts the position of equilibrium, demonstrating Le Chatelier’s principle.

Two coloured cobalt solutions

The equilibrium between two coloured cobalt species

In association with

Watch as the equilibrium between cobalt species Co(H2O)62+ and CoCl42- is disturbed – with an accompanying colour change predicted by Le Chatelier’s principle.

Fizzy water

Equilibria involving carbon dioxide in aqueous solution

In association with

Turn a mixture of methyl red indicator and soda water from red to yellow, and create a less acidic solution as the equilibria adjusts.

Test tube being heated in a flame

Le Chatelier's principle: the equilibrium between nitrogen dioxide and dinitrogen tetroxide

In association with

Explore the effect of pressure and temperature on the equilibrium between nitrogen dioxide and dinitrogen tetroxide.

Image

Entropy and equilibrium

This activity shows the students the fundamental link between entropy and equilibrium and increases students’ understanding of scientific models. It highlights the importance of mathematical descriptions in physical chemistry.