
Reactant: a substance which is in a chemical reaction.
Product: substance which is produced by the chemical reaction.
A chemical change that you are familiar with is rust. In this chemical
reaction, oxygen and iron, which are the reactants, combine to form
a product called iron oxide(rust). To see this reaction take place,
get a nail and leave it outside in the grass for a few days. What happens?
+
air ---------> 
The reactants are the iron in the nail and oxygen in the air. The product
is the rust on the nail. Rust is a new and different substance. It is
the result of a chemical reaction between iron and oxygen.

To see a chemical reaction taking place quickly, first put your safety
glasses on, then place a small amount of baking soda in a glass and
add vinegar. Observe the bubbles and fizzing which is further evidence
of a chemical reaction. In this reaction what are the two reactants?
1.
2.
What is one of the products?
1.
Safety concerns:
Teachers
and students, be sure to keep all Chemical Safety Rules that are specified
by your teacher and in all general laboratory experiences.