How diborane is prepared ?

Explanation

Epsom salt : Epsom salt is magnesium sulphate heptahydrate `(MgSO_(4).7H_(2)O)`.
Preparation : it is prepared in the laboratory by treating magnesium, magnesium oxide or magnesium carbonate with dilute sulphuric acid.
`Mg+H_(2)SO_(4) to MgSO_(4)+H_(2)`
`MgO+H_(2)SO_(4) to MgSO_(4)+H_(2)O`
`MgCO_(2)+H_(2)SO_(4) to MgSO_(4)+H_(2)O+CO_(2)`
On cooling this solution, the crystals of epsom salt `(MgSO_(4).7_(2)O)` are formed.