Question

why is Copper (II) sulfate blue?​

Answer 1

Answer:

• Absorption of Light

As it happens, the difference in energy for the copper sulfate complex is equivalent to the difference in energy for photons of light in the red-orange region of the spectrum. Since reddish light is absorbed while blue light is transmitted, the copper sulfate appears blue

Answer 2

Hey there,

Copper(II) sulfate is a blue when it is hydrated ie. water molecules are present.

Without water molecules it's white in colour.

HOPE THIS HELPS

THANKS