Reaction between concentrated nitric acid and copper
The beaker is filled with a concentrated nitric acid solution, the red metal is copper. In the beaker we see a funnel topped by a test tube.
Copper is introduced under the funnel.
Now copper placed under the funnel.
A reaction starts. The blue colour is due to the appearance of copper(II) ion.
A colourless gas is produced. It's nitrogen monoxide .
The gas enters the test tube.
Nitrogen monoxide is now in the test tube.
We take the test tube out.
Nitrogen monoxide (colourless) is put in contact with air.
A brown gas appears: It's nitrogen dioxide .
The beaker is filled with a concentrated nitric acid solution, the red metal is copper. In the beaker we see a funnel topped by a test tube.
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