Hi guys, I really need help.
So I need find the molecular formula of CuSO4.xH2O.
We used 5.2 g of it, and there was 3.31 g of CuSO4 . With this, I found X to be 5, so, its CuSO4.5H2O
And I found the mass of this to be 250 g. Now how do I get the molecular formula?
Thanks,
-Stan
2007-10-25 07:08:58 · 3 answers · asked by Mike T 1 in Science & Mathematics ➔ Chemistry
The molecular formula is the same as the empirical formula. Add up the atomic weights of Cu, S, 9 O's, and 10 H's, and there you are. 250 = 250
2007-10-25 07:16:16 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
the molecular mass of CuSO4 is 63.6+32+4*16 =159.6 on 5.2g CUSO4 = 3.31g so water is 5.2-3.31=1.89 and the mass of water is 1.89*159.6/3.31=91. Yhis is approximately H2O
and you found also 250 adding 159.6+90
2007-10-25 14:17:00 · answer #2 · answered by maussy 7 · 0⤊ 0⤋
You've got it: CuSO4.5H2O
2007-10-25 14:15:27 · answer #3 · answered by papastolte 6 · 0⤊ 0⤋