Question

percentage composition of water in CuSO4.5H20 (BLUE VITIROL)

Answer 1

Hope this may help uh!!!

Answer 2

Hey Friend,

Atomic weights -
Cu - 64
S - 32
O - 16
H - 1

Molecular weight of CuSO4.5H2O -
= 64 + 32 + (16 x 4) + 5 (2 + 16)
= 64 + 32 + 64 + 90
= 250 grams

Molecular weight of H2O = 18 grams

Percentage composition = number of water molecules x molecular weight of                                                           one water molecule x 100
                                           ------------------------------------------------------------------
                                                   molecular weight of the compound

H2O % in CuSO4.5H2O = 5 x 18 x 100 / 250
                                        = 36 %

Therefore, hydrated copper sulphate contains 36% water molecules.

Hope it helps!