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30 cze 2023 · For example, if you react copper(I) oxide with hot dilute sulfuric acid, you might expect to get a solution of copper(I) sulfate and water produced. In fact you get a brown precipitate of copper and a blue solution of copper(II) sulfate because of the disproportionation reaction.
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Cu (s) + 4 H 3 O + (aq) + 2 NO 3- (aq) --> [Cu (H 2 O) 6] 2+ (aq) + 2 NO 2 (g) Hydroxide ion (OH -) binds to the copper (II) ion even more strongly than does water. As a result, hydroxide ion can displace water from the copper (II) ion, yielding copper hydroxide, Cu (OH) 2, a blue precipitate.
Consider as an example the reaction between one methane molecule (CH 4) and two diatomic oxygen molecules (O 2) to produce one carbon dioxide molecule (CO 2) and two water molecules (H 2 O).
Students remove the water of crystallisation from hydrated copper (II) sulfate by heating. Condensing the vapour produced in a second test tube collects the water. The white anhydrous copper (II) sulfate is then rehydrated and the blue colour returns.
27 paź 2022 · A molecule may consist of two or more identical atoms, as in the molecules found in the elements hydrogen, oxygen, and sulfur, or it may consist of two or more different atoms, as in the molecules found in water. Each water molecule is a unit that contains two hydrogen atoms and one oxygen atom.
For example, if you react copper(I) oxide with hot dilute sulphuric acid, you might expect to get a solution of copper(I) sulphate and water produced. In fact you get a brown precipitate of copper and a blue solution of copper(II) sulphate because of the disproportionation reaction.
In this experiment students study the behavior of copper in sulfur vapor, a piece of sulfur is heated and a picece of copper is held in the vapor in a test tube. The copper and sulfur combine to a new substance, which can be recognized from the change in color, density and other properties.
