1. See if it can burn;

2. When burning, cover 1 above the flame to dry the beaker, which proves that there is no water generated. (excluding the interference of other gaseous organics)

3. The gas generated by combustion is introduced into clear limewater solution, and white precipitate is generated, so the combustion product is carbon dioxide and the original gas is carbon monoxide.

The valence of carbon element in carbon monoxide molecule is +2, which can be further oxidized to +4, thus making carbon monoxide flammable and reducible, and carbon monoxide can be burned in air or oxygen to generate carbon dioxide. Chemical equation: (condition: ignition)

When burning, it emits a blue flame and gives off a lot of heat. Therefore, carbon monoxide can be used as gas fuel.

In the laboratory, concentrated sulfuric acid is generally used to catalyze or heat oxalic acid to decompose and sodium hydroxide is used to remove carbon dioxide to prepare carbon monoxide. The specific reaction is as follows:

As a reducing agent, carbon monoxide can reduce many metal oxides into metallic simple substances at high temperature or heating, so it is often used in metal smelting.

Extended information:

Under the conditions of heating and pressure, it can react with some simple metals to form molecular compounds. Such as Ni(CO)? (nickel tetracarbonyl), Fe(CO)? (iron pentacarbonyl), etc., these substances are unstable and immediately decompose into corresponding metals and carbon monoxide when heated, which is one of the methods to purify metals and prepare pure carbon monoxide.

because CO can react with powdered NaOH to generate sodium formate under certain COnditions, co can be regarded as the anhydride of formic acid.

The chemical properties of carbon monoxide are stable at room temperature, but it can still take part in the reaction. However, it should be noted that a simple potassium permanganate solution cannot react with carbon monoxide.

The common reactions of oxidizing CO at room temperature are as follows:

In addition, carbon monoxide can combine with hydrogen to generate simple organic matter, which is oxidizing.

CO+2H? = = high temperature catalyst ==CH? OH

CO+3H? = = high temperature catalyst ==CH? +H? O

Baidu encyclopedia-carbon monoxide

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