Question

Calculate the percentage of water molecules in hydrated copper sulphate

CuSO4.5H2O​

Answer 1

Answer:The molecular weight of water H  

2

​  

O=2(1)+16=18g/mol.

The molecular weight of copper sulphate pentahydrate CuSO  

4

​  

.5H  

2

​  

O=64+32+4(16)+5(18)=250g/mol.

The percentage of water of crystallization in CuSO  

4

​  

.5H  

2

​  

O=  

250

5×18

​  

×100=36%.

Explanation:

Answer 2

Answer:

The molecular weight of water H2O=2(1)+16=18g/mol.

The molecular weight of copper sulphate pentahydrate CuSO4.5H2O=64+32+4(16)+5(18)=250g/mol.

The percentage of water of crystallization in CuSO4.5H2O=2505×18×100=36%.