Reaction between copper II chloride and H2O2

The video tutorial demonstrates the creation of a copper chloride solution using copper and hydrochloric acid. The instructor then adds 35% hydrogen peroxide to the solution to observe the chemical reaction. The reaction is more vigorous than expected, producing a strong odor and an unexpected result.

What was the teacher's reaction to the smell produced during the experiment?

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How did the outcome of the experiment differ from the teacher's expectations?

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