The diagram shows a test tube of pure copper (II) sulfate, CuSO4

Question

The diagram shows a test tube of pure copper (II) sulfate, CuSO4

, solution before and after the addition of iron, Fe
, shavings.

Which of the following correctly makes and supports a claim about the change that occurred?

Answer 1

Based on the diagram, it can be claimed that a chemical reaction occurred when iron shavings were added to the copper (II) sulfate solution. This claim is supported by the visible change in the color of the solution from blue to brownish-red.