One of the tubes contains a solution of sodium chloride, and the other contains a solution of potassium carbonate.

| July 17, 2021 | education

One of the tubes contains a solution of sodium chloride, and the other contains a solution of potassium carbonate. Based on your knowledge of the conditions for the end of the ion exchange reactions, figure out how to determine where which solution is.

A qualitative reaction to carbonate anions is the reaction with acids. When carbonate interacts with acid, a characteristic “boiling” occurs, that is, a violent evolution of gas bubbles. Therefore, the carbonate is easily recognized by the rush of hydrochloric acid into both tubes. In a test tube with carbonate, we will observe the release of gas, and in another test tube, there will be no signs of a reaction, since the reaction is reversible.

K2CO3 + 2HCl = 2 KCl + CO2 + H2O.

There are no ions in the sodium chloride test tube that could bind to each other.



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