Chemistry, 30.11.2020 08:10 omgomglol

Copper sulfate, when it is dissolved in water, has a blue color. When steel wool is mixed with a copper sulfate solution, the steel wool disappears, a brownish solid forms, and the color of the solution changes from blue to green. Choose one answer that gives the best evidence that a chemical reaction took place.

A. The color change from blue to green happens in nature.

B. The disappearance of the steel wool shows that a new substance has formed.

C. The solid precipitate is a waste product in the reaction.

D. Energy is lost in this reaction like all other reactions.

Which answer did you choose? Explain your reasoning.

Answers: 2

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Copper sulfate, when it is dissolved in water, has a blue color. When steel wool is mixed with a cop...

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