You were told several times - there is no such compound.
I was?
Anyways I had some very interesting theoretical experiments doing this... and some research was invilved as well. With NaCO
3 I tried to find some answers:
NaCO
3 + H
2SO
4 --> NaHSO
4 + HCO
3- (What happens to the HCO3 anion?)
NaCO
3 + HCl --> NaOH + Cl + CO
2 (I am not at all sure about this one. I had to re-do it a couple of times and I still don't know.)
NaCO
3 + H
2O
2 --> NaCO + H
2O (This one I am pleased with, but I'm probably not right.)
Then with CuSO
4 I wanted to see if I could isolate the Cu:
CuSO
4 + H
2SO
4--> CuO
2 + S
2O
4 + H
2O
2 (A lot of guessing work. Not at all sure on this one.)
CuSO
4 + 2HCl --> CuCl
2 + H
2SO
4 (This one took a lot of re-doing as well and I have no clue about it.)
CuSO
4 + H
2O
2 --> Cu + H
2SO
6 (This one I think I might have found my goal, but once again it's scrappy.)