Question

During an experiment, a scientist placed a small, copper metal tube into a colorless liquid. He observed a black powdery-looking substance form on the surface of the copper metal tube. The scientist compares the properties of the copper metal tube to the properties of the resulting substance, as shown in the table. Make a claim about whether or not a chemical reaction took place between the copper metal tube and the liquid. Support your claim with evidence from the experiment.

Answer 1

Answer:

Yes, a reaction took place between the copper metal tube and the liquid.

Explanation:

This is because the liquid caused some chemical changes in a certain quantity of copper from the tube,thus forming the previously not present black powdery residue. This black residue, as we can clearly see, was not present before, and was only formed when the liquid stayed in the tube for a certain amount of time, and had different chemical properties than either of the substances, indicating that some chemical changes took place, and a chemical reaction occurred.