An aqueous copper(II) sulfate solution is put into an iron container and left for several days. Which statement describes the change that occurs?
- AAtmospheric oxygen reacts with the copper(II) sulfate to give black copper(II) oxide.
- BSome fine iron particles are formed in the solution.
- CThe part of the container in contact with the solution is coated with copper.
- DThe solution turns from green to blue.