CoachThe species used up in a chemical reaction are the reactants; the species formed are the products.
Examples
Example 12.6 (Carbon burning in oxygen)
When charcoal burns, the reactants are carbon (the charcoal) and oxygen (from the air). The product is carbon dioxide: shaken with limewater, the gas left in the jar turns it milky.
Example 12.7 (Steel wool)
A pad of fine steel wool, which is mostly iron, can burn in air with showers of sparks. The reactants are iron and oxygen; the product is a dark, crumbly solid, an iron oxide.