Answer : The correct answer for molarity of MgCl₂ solution is 0.67 M.
Molarity :
It expresses concentration of any solution . It can be defined as mole of solute present in volume of solution in Liter .
It uses unit M or [tex] \frac{mol}{L} [/tex]
It can be formulated as :
[tex] Molarity (\frac{mol}{L} ) = \frac{mole of solute (mol)}{volume of solution (L)} [/tex]
Given : mol of MgCl₂ (solute ) = 0.50 mol
Volume of solution = 750 mL
Following steps can be done :
Step 1 ) To convert volume of solution from mL to L
1 L = 1000 mL
[tex] Volume of solution = 750 mL * \frac{1 L}{1000mL} [/tex]
Volume of solution = 0.750 L
Step 2) To find molarity
Plugging mole of solute and volume of solution in molarity formula as :
[tex] Molarity = \frac{0.50 mol}{0.750 L } [/tex]
[tex] Molarity = 0.67 \frac{mol}{L} [/tex]
Hence molarity of MgCl₂ solution is 0.67 M
