Advanced Highschool Chemistry Lab

[Lyristes]

This is one of the problems I can't answer for this lab:

1. Heat CuSO₄*5H₂O
2. Add H₂O to CuSO₄
3. Add NH₃ to CuSO₄(aq)
4. Add H₂SO₄ to Cu(NH₃)₄ 2+

Why can't carbonates, chlorates, or hydroxides be used in this experiment? Explain and specify what is produced when these compounds are heated.
I answered: Carbonates, chlorates, and hydroxides can't be used in this experiment because they decompose into metal oxides and gas upon heating, which would interfere with the determination of the water of hydration.
Carbonates (e.g., CaCO₃) decompose to form oxides and carbon dioxide.
Chlorates (e.g., KClO₃) decompose to form chlorides and oxygen gas.
Hydroxides (e.g., NaOH) decompose to form oxides and water vapor.

I think this is wrong and/or incomplete.

Can someone please help me answer this?

[ChenBeier]

The answers are correct and ok.

[Lyristes]

Thank you!