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Drop the HCL solution into a test tube containing cuo powder

User Cespinoza
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Answer:

When you drop hydrochloric acid (HCl) solution into a test tube containing copper(II) oxide (CuO) powder, a chemical reaction occurs. This reaction is known as an acid-base reaction and involves the exchange of ions between the HCl solution and the CuO powder. Here's what happens:

1. CuO (copper(II) oxide) is a basic oxide, meaning it has the ability to react with acids.

2. HCl is an acid, which dissociates in water to produce hydrogen ions (H+) and chloride ions (Cl-).

3. When you add HCl solution to the test tube containing CuO powder, the following reaction takes place: CuO + 2HCl -> CuCl2 + H2O.

4. In this reaction, the CuO reacts with HCl to form copper(II) chloride (CuCl2) and water (H2O).

5. The copper(II) chloride formed may dissolve in the excess HCl solution, resulting in a greenish-blue solution.

It's important to handle chemicals with caution and perform this experiment in a controlled environment, following appropriate safety protocols.

User Ptah
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