Middle school chemistry experiment report
1 Ventilation into the container using catalyst to slow down the reaction rate
2Selection of reaction vessel The airtightness of the reaction vessel is as follows. For other experimental methods, for example, two ignited candles are placed at different vertical heights of the large beaker, and carbon dioxide gas is slowly poured into the beaker, and the candle of the lower layer is first extinguished to indicate carbon dioxide. The density is greater than air. The article you are viewing is organized, and the copyright belongs to the original author and the original source.
There are other gases in the three bottles, which can not fully reflect the test conclusion.
2 Let the carbon dioxide react with sodium hydroxide first, and completely reflect the mixed solution of dilute hydrochloric acid and copper sulfate added to the solution. If there is a blue precipitate, it will not be reflected. If there is gas, the reaction will be
2Selection of reaction vessel The airtightness of the reaction vessel is as follows. For other experimental methods, for example, two ignited candles are placed at different vertical heights of the large beaker, and carbon dioxide gas is slowly poured into the beaker, and the candle of the lower layer is first extinguished to indicate carbon dioxide. The density is greater than air. The article you are viewing is organized, and the copyright belongs to the original author and the original source.
There are other gases in the three bottles, which can not fully reflect the test conclusion.
2 Let the carbon dioxide react with sodium hydroxide first, and completely reflect the mixed solution of dilute hydrochloric acid and copper sulfate added to the solution. If there is a blue precipitate, it will not be reflected. If there is gas, the reaction will be
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