The following is an introduction to the process and results of the reaction between Laboratory Chemical Reagent Aluminum Sulfate and carbonate reagents:
Reaction process
When Laboratory Chemical Reagent Aluminum Sulfate comes into contact with carbonate reagents, a double hydrolysis reaction will first occur. Laboratory Chemical Reagent Aluminum Sulfate will ionize aluminum ions in aqueous solution, while carbonate reagents such as sodium carbonate will ionize carbonate ions. The hydrolysis of aluminum ions makes the solution acidic, and the hydrolysis of carbonate ions makes the solution alkaline, and the two promote each other's hydrolysis. Aluminum ions combine with hydroxide ions in water to form aluminum hydroxide precipitates, while carbonate ions combine with hydrogen ions in water to form carbonic acid. Carbonic acid is unstable and will decompose to produce carbon dioxide gas.
Reaction phenomenon
During the reaction, obvious phenomena can be observed. A large amount of white precipitate will quickly form in the solution, which is the result of the continuous generation and aggregation of aluminum hydroxide precipitates. At the same time, accompanied by the violent generation of bubbles, these bubbles are carbon dioxide gas. Due to the violent reaction, the solution may tumble and become turbid. As the reaction proceeds, the white precipitate will gradually increase and settle to the bottom of the container, while gas will continuously escape from the top of the solution.
Result analysis
The result of the reaction is the generation of aluminum hydroxide precipitate, sodium sulfate solution and the release of carbon dioxide gas. The aluminum hydroxide precipitate can be separated from the solution by filtration and other methods to obtain relatively pure aluminum hydroxide solid. The solution mainly contains soluble salts such as sodium sulfate, which significantly changes the composition of the solution. In addition, due to the escape of carbon dioxide gas, the total amount of substances in the reaction system is also reduced. This reaction result can be used to prepare aluminum hydroxide in the laboratory, and it also reflects the principle of mutual promotion of salt hydrolysis, which is of great significance for understanding and studying the laws of chemical reactions.
