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: A colour change ...

Physical chemists are focused on understanding the physical properties of atoms and molecules, the way chemical reactions work, and what these properties reveal. Their discoveries are based on ...

to the indicator and see that the two solids cause different color changes. Students recognize that a particular color change is a characteristic property of a substance and that a color change can ...

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 ...