Question

Compound A is a colourless crystalline hydrated salt of magnesium.on heating it becomes an anhydrous salt.the number of water molecules lost by compound A is equal to the number of water molecules present in green vitriol on heating

Answer 1

• Compound A is Epsom salt or Magnesium Sulphate heptahydrate (MgSO4.7H2O)

Answer 2

Compound A is Epsom salt or Magnesium Sulphate heptahydrate (MgSO4.7H2O)

- Green Vitriol is the compound of iron denoted by the formula FeSO4·7H2O

- It is clear that it has 7 molecules of water.

- So, the given magnesium salt A loses 7 water of crystallisation on heating.

- The colourless crystalline magnesium salt with 7 water of crystallisation is Epsom Salt.