reaction
The substance that reacts chemically with another to produce heat is called a "reactant."
This is called reactivity.
When one liquid reacts with another it is called a precipitate.
the way a substance reacts with other substances is called
Compound
This is called a mixture.
Four ways to chemically change a substance include burning (combustion), which reacts a substance with oxygen; oxidation, where a substance reacts with oxygen, often resulting in rusting; acid-base reactions, where an acid and a base neutralize each other to form water and salt; and fermentation, where microorganisms convert sugars into alcohol or acids. Each of these processes alters the chemical composition of the original substance, resulting in new products.
compound
The ability to combine chemically through the formation of chemical bonds with another substance is a chemical property.
a catalyst
A substance made of two or more elements that have been chemically combined is called a compound. In a compound, the elements are chemically bonded together in fixed ratios to form a new substance with unique properties different from the individual elements.
These substances are called catalysts.