How to identify sodium carbonate and sodium bicarbonate_Industrial additives

How to identify sodium carbonate and sodium bicarbonate sodium carbonate

Sodium carbonate is commonly known as soda ash, soda, and white powder. It has good thermal stability and is not easy to decompose when heated. Solubility in water is relatively large. Reacts with acid Na2CO3 + 2HCl=2NaCl + CO2↑+ H2O

React with alkali Na2CO3 +Ca(OH)2=CaCO3↓+ 2NaOH Sodium carbonate can be converted into sodium bicarbonate, the reaction equation is: Na2CO3 + H2O + CO2=2NaHCO3

How to identify sodium carbonate and sodium bicarbonate sodium bicarbonate

Sodium bicarbonate, commonly known as baking soda, is a small white crystal with poor thermal stability. It is easily decomposed by heat and has relatively low solubility. It reacts with acid. Na Mica HCO3 + HCl =NaCl + CO2↑+ H2O

React with alkali NaHCO3+ NaOH=Na2CO3 Calcium carbonate + H2O Under certain conditions, sodium carbonate can also be converted into sodium bicarbonate. The reaction formula is: 2 NaHCO3=Na2CO3 + H2O + CO2↑ (Condition: heating)

How to identify sodium carbonate and sodium bicarbonate How to identify sodium carbonate and sodium bicarbonate

1. When heated, sodium bicarbonate has poor thermal stability, and what can be decomposed is sodium bicarbonate.

2. Dissolve equal amounts in water and observe which of the two dissolves more. The solubility of sodium bicarbonate is small.

3. Dissolve an equal amount in water and measure its pH value. The value of sodium carbonate is larger.

4. Add hydrochloric acid dropwise. When hydrochloric acid is added dropwise to the sodium bicarbonate solution, bubbles will be generated immediately, but when added dropwise to the sodium bicarbonate solution, bubbles will not be generated.

5. Add calcium chloride solution and use the metathesis reaction. The sodium carbonate solution reacts with calcium chloride to produce a white precipitate, but sodium bicarbonate does not.