Decomposition reactions | 11–14 years

Decomposition reactions allow lots of opportunities for practical work or demonstrations. Using these question sheets, learners can apply their knowledge to questions that link decomposition reactions to word equations, symbol equations and conservation of mass.

There are two versions of the worksheet. An unscaffolded version where learners can write the answers in their own words and a scaffolded version where learners can use the prompts, key words and fill-in-the-gap style questions to support their answers. The scaffolded version is denoted by the symbol ‘S’ in the document header. A challenge question is included at the end of both versions.