Copper sulphate conduct electricity only in molten state or in aqueous phase because on dissolving or melting it. copper sulphate dissociate in copper ion and sulphate ion and became free to move.
As they are freeto move in molten and aqueous phase the charge particle conduct electricity.
In solid and any other ionic form the ions held in a lattice and unable to move so they are not conduct electricity.
Molality (m) is defined as the number of moles of the solute per kilogram (kg) of the solvent and is expressed as:
Calculate (a) molality (b) molarity and (c) mole fraction of KI if the density of 20% (mass/mass) aqueous KI is 1.202 g mL-1.
Molarity (M) is defined as number of moles of solute dissolved in one litre (or one cubic decimetre) of solution.
(a) Mol. mass of
Volume of solution = 4.3 L
(b) Number of moles present in 1000 ml of 0.5M H2SO4= 0.5 mol
therefore number of moles present in 30ml of 0.5M H2SO4=mol =0.015mol
therefore molarity =0.015/0.5L
thus molarity is 0.03M