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
a catalyst
The ability to combine chemically through the formation of chemical bonds with another substance is a chemical property.
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.