What is CaCO3? Important knowledge about CaCO3.

  1. Definition of CaCO3

CaCO3 or Calcium Carbonate is a type of salt of calcium and carbonic acid.
1.1 Names
1.1.1 Common names: Calcium carbonate, quicklime, limestone.
1.1.2 English name: Calcium carbonate.
1.2. Atomic structure: In a CaCO3 molecule, there is one calcium atom, one carbon atom and three oxygen atoms.
1.3. Atomic mass: The atomic mass of CaCO3 is 100.0869 g/mol.
1.3.1 Molecular structure: The CaCO3 molecule consists of one calcium ion (Ca2+) and one carbonate ion (CO32-).
1.4 Ion structure: Calcium ion (Ca2+) and carbonate ion (CO32-).

  1. Properties: CaCO3

2.1 Physical properties of CaCO3
State: solid under standard conditions.
Color: white or colorless.
Odor: odorless.
pH: neutral.
2.2 Chemical properties of CaCO3: It reacts with acid to produce CO2 gas.

  1. Common chemical equations for CaCO3
    Reaction with acid: CaCO3 + 2HCl -> CaCl2 + CO2↑ + H2O.

  2. Preparation of CaCO3

4.1 Laboratory preparation of CaCO3: CaO + CO2 -> CaCO3.
4.2 Industrial preparation of CaCO3: This is the process of melting limestone (CaCO3) into quicklime (CaO), then slaking lime (the reaction of CaO with water) to produce hydrated lime (Ca(OH)2), and finally reacting hydrated lime with CO2 to create CaCO3.

Leave a Comment