Molarity of a solution is the number of moles of solute divided by the liters of solution present. The molecular weight of magnesium chloride is 95.2 g/mol.
First, we compute the moles of magnesium chloride:
2.234 / 95.2 = 0.023 mol
The liters of solution are:
250 / 1000 = 0.25
Molarity = moles / liter
Molarity = 0.023 / 0.25
The molarity of the solution is 0.092.
