What is H2? Important Knowledge about H2

  1. Definition of H2

Hydrogen (H2) is a chemical element with an atomic weight of 1 and is the lightest known gas. It is the most common element in the universe, accounting for about 75% of the mass of matter. The H2 molecule consists of two hydrogen (H) atoms linked together, forming a diatomic form (two atoms per molecule).

1.1 Names
1.1.1 Common name: Hydro
1.1.2 English name: Hydrogen
1.2. Atomic weight: 1
1.3. Atomic mass: 1.008
1.3.1 Molecular structure: H2
1.4 Ion structure: H+

  1. Properties: H2

2.1 Physical properties of H2
State: Gas
Color: Colorless
Smell: Odorless
pH: Not applicable since H2 is a gas that does not produce water.
2.2 Chemical properties of H2: Hydrogen can react with many other elements to form compounds.

  1. Common chemical equations with H2
    Water formation reaction: 2H2 + O2 -> 2H2O
    Ammonia formation reaction: 3H2 + N2 -> 2NH3
    Methane formation reaction: 2H2 + C -> CH4

  2. Preparation of H2

4.1 Laboratory preparation of H2: Heating acid with metals such as iron, lead or zinc.
4.2 Industrial preparation of H2: The steam reforming process is used to produce hydrogen from hydrocarbons such as methane.

Leave a Comment