What is Li2S? Important knowledge about Li2S

1. Definition of Li₂S
   Li₂S is the chemical formula for Lithium Sulfide, a chemical compound consisting of 2 lithium atoms and one sulfur atom.

1.1 Names
1.1.1 Common name: Lithium Sulfide
1.1.2 English name: Lithium Sulfide
1.2. Atomic weight: Li₂S consists of 2 lithium atoms and 1 sulfur atom
1.3. Molar mass: 45.95 g/mol
1.3.1 Molecular structure: Comprises of 2 lithium atoms and 1 sulfur atom
1.4 Ion structure: Li₂S is formed when two lithium+ ions and one sulfide 2- ion combine.

2. Properties of Li₂S
   2.1 Physical properties of Li₂S
   State: Li₂S is solid at room temperature
   Color: Gray-white
   Smell: Odorless
   2.2 Chemical properties of Li₂S:
   Li₂S readily reacts with water to form LiOH and H₂S, as well as with acid to form hydrogen sulfide.

3. Common Chemical Equations of Li₂S

   • Li₂S + 2H₂O -> 2LiOH + H₂S
   • Li₂S + 2HCl -> 2LiCl + H₂S

4. Synthesis of Li₂S
   4.1 Laboratory synthesis of Li₂S: Li₂S can be synthesized by heating lithium with sulfur at high temperatures.

   • 2 Li + S -> Li₂S
     4.2 Industrial synthesis of Li₂S: In industry, Li₂S can be produced by reacting hydrogen sulfide with lithium at high temperatures.
   • 2 Li + H₂S -> Li₂S + H₂.