This resource, from the Royal Society of Chemistry, is designed to support students understanding and explanations of chemical reactions at the particle level.
Students are provided with diagrams representing the particles present in the reaction between silver nitrate solution and sodium chloride solution to make silver chloride. They use the particle models to explain stages in the preparation of silver chloride, such as dissolving and filtering.
The second activity may be used to see if the exercise has helped students clarify their ideas. It is intended for students aged 14-16 who are familiar with precipitation reactions, solubility and formation of ionic bonding. It may also be useful for assessing alternative conceptions of post-16 students.