20g of sodium carbonate can be dissolved in100g of water at 20℃, with the highest solubility at 35.4℃. 49.7g of sodium carbonate is soluble in100g of water, slightly soluble in anhydrous ethanol, and hardly soluble in propanol. The solubility of sodium bicarbonate in water is less than that of sodium carbonate. Above 50℃, solids begin to decompose into sodium carbonate, carbon dioxide and water, and completely decompose at 270℃.

Different temperatures have different solubility.

1, sodium carbonate:

Temperature 0℃10 20 25 30 40 50 60 80100.

Solubility 712.221.8 29.4 39.7 48.8 47.3 46.4 45.144.7.

2, sodium bicarbonate:

Temperature 0℃ 5 15 20 30 40 50 60

Solubility 6.9 7.45 8.85 9.61.1.12.714.4516.4.

Reason:

In the crystal structure of NaHCO, the intermolecular hydrogen bond between -HOCO and another -HOCO forms a dimer, which consumes a certain amount of energy when HO acts, and its solubility is slightly less than that of NaCO.

Sodium bicarbonate can be converted with sodium carbonate;

NaHCO？ +NaOH==Na？ CO？ +H？ O (condition: heating)

Na？ CO？ +CO？ +H？ O==2NaHCO？ (Condition: None)

Reference source; Baidu encyclopedia-solubility