In this Activity, students compare the combustion of different substances such as a glowing wooden toothpick and lit birthday candle in air, oxygen, exhaled breath, and carbon dioxide environments. The oxygen and carbon dioxide are generated from supermarket chemicals. This Activity can be used to explore the chemistry of oxygen and combustion. It can also be used in a discussion of redox chemistry or of reaction kinetics, and in particular the effect of a reactant concentration on the apparent rate of a reaction (combustion).
Stephen W. Wright, J. Chem. Educ. 2003, 80, p1160A.