Depending on what your teacher is looking for, you might be overthinking this one.
Immediate after heating the copper sulfate forms a dry, light blue solid.
Right after the heating is complete the reaction is:
The addition of water reverses the removal of water.
If you add exactly 5 parts water for every one part copper sulfate the solid will return to being
Adding any extra water will cause the formation of a copper sulfate solution of
Hope this helps!