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Need help calculating number of water molecules in a hydrate?
I have noticed that the number of water molecules in a hydrate is constant. For example copper always has 5 water molecules and Magnesium has 7. Can somebody please give me a list of the most common metals and the number of water molecules in their hydrates?
Thanks
2 Answers
- ?Lv 610 years agoFavorite Answer
Potas Alum: KAl(SO4)2.12H2O
Soda Alum :NaAl(SO4)2·12H2O
Ammonium alum: NH4Al(SO4)2·12H2O
Blue Vitriol :CuSO4.5H2O
Green Vitriol:FeSO4.7H2O
White Vitriol:ZnSO4.7H2O
You will get whole lot of it in the source below:
Source(s): http://en.wikipedia.org/wiki/Alum http://en.wikipedia.org/wiki/Green_vitriol http://en.wikipedia.org/wiki/White_vitriol - ?Lv 45 years ago
Use the molecular weight of the unhydrated salt. If this is W, then we have W + 18n = 2.99W/1.78, and you can solve for n.
