Answer: D) 1.30 and 2.60
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n = moles of solute
[tex]V_s[/tex] = volume of solution in ml
molarity of [tex]MgCl_2[/tex] = [tex]\frac{0.325\times 1000}{250ml}=1.30 M[/tex]
[tex]MgCl_2\rightarrow Mg^{2+}+Cl^{-}[/tex]
As 1 mole of [tex]MgCl_2[/tex] dissociates to give one mole of [tex]Mg^{2+}[/tex] and two moles of [tex]Cl^-[/tex] ions .
Molarity of [tex]Mg^{2+}[/tex] = 1.30 M
Molarity of [tex]Cl^{-}[/tex] = [tex]1.3 M\times 2=2.60M[/tex]
