Revise: Rates of reactionIndicators of a chemical reaction
Chemical reactions happen at different rates. If you know how to control the speed of a reaction, you can measure its rate. This data can be shown by a rate graph.
A chemical reaction is when one or more substances change and produce one or more new chemical substances.
The substances that are involved in a chemical reaction and that are changed by it are called reactants.
The substances that are produced by a chemical reaction are called products.
Chemical reactions happen all around us (and inside us!) all the time. We might not always notice them but there are four indicators that show a chemical reaction has taken place:
