What is N2H4? Important Knowledge about N2H4

1. Definition of N₂H₄

1.1 Names
1.1.1 Common name: N₂H₄ or symbolically known as Hydrazine.
1.1.2 English name: Hydrazine.
1.2. Atomic mass: N₂H₄ consists of 2 Nitrogen atoms and 4 Hydrogen atoms.
1.3. Molecular weight: The total weight of the Hydrogen and Nitrogen atoms in a N₂H₄ molecule is 32.05 g/mol.
1.3.1 Molecular structure: The N₂H₄ molecule consists of 2 Nitrogen atoms linked through a double covalent bond, and each Nitrogen atom is linked to 2 Hydrogen atoms through single covalent bonds.
1.4 Ion structure: In some cases, N₂H₄ can form ions such as N₂H₄+, N₂H₄-.

2. Properties: N₂H₄

2.1 Physical properties of N₂H₄
State: colorless liquid.
Color: colorless.
Odor: has a sharp, unpleasant odor.
pH: neutral.
2.2 Chemical properties of N₂H₄: It is a fairly reactive substance, capable of reacting with many other substances such as O₂, Br₂, Cl₂, and various types of acids.

3. Common chemical equations involving N₂H₄
   Metal reaction: N₂H₄ + 2Na -> Na₂N₂ + 2H₂(example)
   Acid reaction: N₂H₄ + 2HCl -> 2NH₄Cl
   Non-metal reaction: N₂H₄ + Cl₂ -> N₂ + 4HCl
   Reaction with salt: N₂H₄ + 2AgNO₃ -> Ag₂N₂ + 2HNO₃

4. Synthesis of N₂H₄

4.1 Laboratory synthesis of N₂H₄: N₂H₄ can be synthesized from NH₃ and a small amount of bleaching powder.
4.2 Industrial synthesis of N₂H₄: In industry, N₂H₄ is usually produced from NH₃ and hypochlorite in an aqueous alkali solution.