Chemistry experiment 29 - Copper + nitric acid fountain

Copper reacts with nitric acid, forming blue Cu2+ ions. Also, a brownish mixture of nitrogen dioxide and nitric oxide gas is formed. Nitrogen dioxide reacts with water, forming nitric acid. The latter reaction causes a low pressure in the left flask. Therefore, water from the right flask is sucked into the left flask.

Hazards:
- Nitric acid is corrosive.
- Formed gases are very toxic.

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