Calculate the number of molecules of water of crystallisation in copper sulphate crystals, if 10g of hydrous copper sulphate crystals - Chemistry - Mole Concept and Stoichiometry

Question

C a l c u l a t e   t h e   n u m b e r   o f  
m o l e c u l e s   o f   w a t e r   o f   c r
y s t a l l i s a t i o n   i n   c o p p e r   s u
l p h a t e   c r y s t a l s ,   i f   10 g  
o f   h y d r o u s   c o p p e r   s u l p h a t e
  c r y s t a l s   g i v e   6 4 g   o f
  a n h y d r o u s   C u S O 4   o n   h e a t
i n g [Cu=64, S=32, O=16]

Akansha Chauhan · Accepted Answer

Dear Student,

Value of mass of water obtained from heating of 10 g of hydrated
copper sulphate is not given so by assuming it to be 3 6 g the
value of water of crystallisation can be calculated as follows

Mass of CuSO4 = 160g
Mass of water = 18 g

Mass of waterMass of anhydrous copper sulphate =18 X160=3
66 4X =3 6×1606
4×18  = 5So number of water of crystallisation is 5Regards