`5 g` of `CuSO_(4). 5H_(2)O` is intended to be prepared by using `CuO` and four times the stoichiometric amount of `H_(2)SO_(4)`. Assuming that `10%` of the material is lost in crystallisation, what weight of oxide should be taken and how many litre of `mL` of a `5 M H_(2)SO_(4)`?