formula of this hydrated salt. show work.
2007-03-14 20:22:13 · 2 answers · asked by darkraven_222000 1 in Science & Mathematics ➔ Chemistry
consider we have 100g of hydrate of copper;
from this 100gr, 36gr is water and 64gr is CuSO4;
now we want to know how many moles of each one exists?
36gr of water (molecular weight = 18) have 2 (36/18) moles
& 64gr of CuSO4 (molecular weight = 160) have 0.4 (64/160) moles;
now we want to know for one mole of CuSO4 how many moles of water needed; it's so simple:
no of moles of water = 1 x (2/0.4)= 5
The answer is five;
it means CuSO4 (H2O)5
Hope this helps
2007-03-14 21:42:50 · answer #1 · answered by arman.post 3 · 0⤊ 0⤋
Divide the 64 by 160, and the 36 by 18 (you are actually calculating moles). Now make these two numbers into whole numbers by scaling them up, and you have your ratio of copper sulphate to water.
2007-03-15 03:29:33 · answer #2 · answered by Gervald F 7 · 0⤊ 0⤋