Sodium carbonate is added to increase the pH of the solution.
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Firstly, they'll react each other forming sodium hydrogen carbonate and sodium chloride. If there is excess HCl, the sodium hydrogen carbonate would further react till sodium chloride and evolve carbon dioxide.
When sodium hydrogen sulfate is added to sodium carbonate, a double displacement reaction occurs. This results in the formation of sodium sulfate and carbonic acid. However, carbonic acid is unstable and breaks down into water and carbon dioxide.
When hydrochloric acid is added to sodium hydrogen carbonate, a chemical reaction occurs. The acid reacts with the carbonate to form carbon dioxide gas, water, and sodium chloride. This reaction results in effervescence due to the release of carbon dioxide gas.
Sodium carbonate
Universal indicator changes to green when sodium bicarbonate is added.
When copper carbonate is added to sodium hydroxide, a chemical reaction occurs to form copper hydroxide and sodium carbonate. Copper hydroxide is a blue solid precipitate, while sodium carbonate remains as a soluble compound in the solution.
Carbon dioxide gas is produced when any strong acid is added to a metal carbonate.
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The sodium carbonate is added to the distillate to neutralize any remaining acidity in the sample. This helps stabilize the pH of the solution and ensures accurate results in subsequent testing.
Sodium carbonate is added in aqueous solution to provide a basic environment for reactions. It can help to neutralize acids present in the solution and adjust the pH to a desired level for certain chemical reactions to occur efficiently. Additionally, sodium carbonate can also act as a source of carbonate ions in reactions that require them.