During a chemical change, what are the reactants and what are the products?

Jan 19, 2017

Reactants are the materials you start with. These are written to the left of the arrow in an equation. Products are what is formed by the process, and are written to the right of the arrow.

Explanation:

Here is an example, in which methane gas, $C {H}_{4}$ (a common component of natural gas) burns in oxygen gas to form carbon dioxide and water

$C {H}_{4} + 2 {O}_{2} \rightarrow C {O}_{2} + 2 {H}_{2} O$

The reactants are the methane and oxygen; the products are carbon dioxide ($C {O}_{2}$) and water.

Jan 19, 2017

The $\text{reactants}$ are garbage in; and the $\text{products}$ are garbage out.........
$A + B \rightarrow C + D$
AS written, $A$ and $B$ are the reactants; what you start with in the reaction. And of course, the products of chemical change are $C$ and $D$.