Water can be either a reactant, or a product. It really depends on the type of chemical equation. Here are examples of both water being on the reactant side, and the product side.
Reactants
2H2O ===> 2H2 + O2
HCl + H2O ===> Cl- + H3O+
Products
CH4 + 2O2 ===> CO2 + 2H2O
2H2O2 ===> 2H2O + O2
An example of a chemical equation where both the reactant and product have an equal number of atoms of a given element is the reaction of hydrogen gas (H2) with oxygen gas (O2) to form water (H2O). In this reaction, two molecules of hydrogen gas combine with one molecule of oxygen gas to produce two molecules of water.
When hydrogen and oxygen combine to form water, water is a product of the reaction.
Hydrogen and oxygen are the reactants and water is the product.
Reactant
When oxygen and hydrogen combine, they form water.
The reactant, because it is reacting to form the product of H2O.
When hydrogen and oxygen combine to form water, water is a product of the reaction.
the reactants are hydrogen and water, and the product is oxygen.
When they combine they form a product
Oxygen is a reactant
When hydrogen and oxygen combine to form water, water is a product of the reaction.
An example of a chemical equation where both the reactant and product have an equal number of atoms of a given element is the reaction of hydrogen gas (H2) with oxygen gas (O2) to form water (H2O). In this reaction, two molecules of hydrogen gas combine with one molecule of oxygen gas to produce two molecules of water.
When hydrogen and oxygen combine to form water, water is a product of the reaction.
Hydrogen and oxygen are the reactants and water is the product.
I think Hydrogen Peroxide is a reactant,because hydrogen and oxygen are reactants so hydrogen peroxide should be a reactant.
they make water
When you combine one Oxygen and one Hydrogen you get Hydroxide. If you combine one Oxygen with two hydrogens you will end up with water.