SODIUM CARBONATE Na2CO3

Properties of Sodium carbonate Na2CO3:

Soda (hydrate), soda ash, or washing (anhydrous). White, melts without decomposition, decomposes on further heating. Readily soluble in water (strong hydrolysis on the anion), creates a highly alkaline solution. Reacts with acids, non-metals and their oxides. Reduced by carbon.


Molar mass g/mol 105.99
Density g/cm3 2.539
Melting point °C 851
Solubility in water at 20°C g/100g water 21.8

Obtaining Sodium carbonate Na2CO3:

2 Na2O2 + 2CO2 = 2Na2CO3 + O2

Na2O2 + CO = Na2CO3 (normal temp.).

NaOH (diluted) + EO2 = NaHEO3 (E = С, S)

2 NaOH (conc.) + EO2 = Na2EO3 + H2O.

2 NaHCO3 = Na2CO3 + CO2 + H2O (250-300°С).

NaHCO3 + NaOH (conc.) = Na2CO3 + H2O.

Na2SO4 + 2C(coke) + CaCO3 = Na2CO3 + CaS + CO2 (1000°С).


Reactions with Sodium carbonate Na2CO3:

Na2CO3 = Na2O + CO2 (1000° С).

Na2CO3-10H2O = Na2CO3 + 10H2O (100-120° С, vacuum).

Na2CO3 (diluted) + 8 H2O = 2 [Na(H2O)4]+ + CO32-

CO32- + H2O ↔ HCO3- + ОН-.

Na2CO3 + 2 НСl (diluted) = 2NaCl + CO2↑ + H2O.

Na2CO3 (saturated) + H2O + CO2 = 2 NaHCO3↓ (30-40° С).

Na2CO3 + 2 HF (diluted) = 2 NaF + H2O + CO2↑

Na2CO3 + 4 HF (conc.) = 2Na(HF2) + CO2↑ + H2O.

3Na2CO3 (conc.) + 2H3PO4(diluted) = 2Na3PO4 + 3H2O + 3CO2↑ (boiling).

Na2CO3 + M(ОН)2 (saturated) = MCO3↓ + 2 NaOH (M = Ca, Sr, Ba).

3Na2CO3 + 3H2O(hot) + 2AlCl3 = 2 Al(OH)3↓ + 3 CO2↑ + 6NaCl.

Na2CO3 (conc.,hot) + 3E2 = 5NaE + NaEO3 + 3CO2↑ (E = Cl, Br, I).

Na2CO3 + 2C(coke) = 2Na + 3CO (900-1000° C).

Na2CO3 + C(coke) + CaCN2 = 2 NaCN + CaCO3 (600-700° C).

Na2CO3 (conc.) + SO2 = Na2SO3 + CO2↑.


 

Did you know?

Graphite can be transformed into diamond by applying a temperature of 3000°C and pressure of 100,000 atm.