It can be both.
The reactant, because it is reacting to form the product of H2O.
Hydrogen can be a reactant or a product, it depends on the chemical reaction. Anything to the left of the arrow is consumed by the reaction and is thus a reactant, so hydrogen is a reactant in the reaction O2 + 2H2 -> 2H2O. A product is on the right of the arrow and is produced by the reaction, so hydrogen is a product in the reaction Zn + 2HCl -> ZnCl2 + H2
Typically in the laboratory setting, hydrogen gas is often tested using the reaction between hydrogen and oxygen gas. This reaction forms water as the product. The presence of hydrogen gas in the reaction can be confirmed by observing the formation of water, such as condensation or droplets on the surface.
When hydrogen gas reacts with fluorine gas, the product formed is hydrogen fluoride (HF) gas.
For copper, it is an element. It could be both reactant and product. While purifying copper will be the product. But copper would be the reactant in case of preparing hydrogen or copper sulphate salts.
In some reactions water is a reactant, but in others it is a product. Ex: HCl + NaOH --> NaCl + water (water is a product) Na + water --> NaOH + hydrogen gas (water is a reactant)
The reactant, because it is reacting to form the product of H2O.
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
It is reactant!
For copper, it is an element. It could be both reactant and product. While purifying copper will be the product. But copper would be the reactant in case of preparing hydrogen or copper sulphate salts.
Hydrogen can be a reactant or a product, it depends on the chemical reaction. Anything to the left of the arrow is consumed by the reaction and is thus a reactant, so hydrogen is a reactant in the reaction O2 + 2H2 -> 2H2O. A product is on the right of the arrow and is produced by the reaction, so hydrogen is a product in the reaction Zn + 2HCl -> ZnCl2 + H2
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.
the reactants are hydrogen and water, and the product is oxygen.
Typically in the laboratory setting, hydrogen gas is often tested using the reaction between hydrogen and oxygen gas. This reaction forms water as the product. The presence of hydrogen gas in the reaction can be confirmed by observing the formation of water, such as condensation or droplets on the surface.
When hydrogen gas reacts with fluorine gas, the product formed is hydrogen fluoride (HF) gas.
produce
if it is hydrogen gas, that is easier,2 If it is in water with 2 oxigen atoms in is not.