Determine the chloride ion concentration in a solution containing 50.0 g MgCl2 dissolved in 1500 mL of solution.

Question

a. 0.350 M
b. 0.700 M
c. 1.40 M
d. 3.17 M
e. 6.34 M

Answer 1

50g of MgCl2 is how many moles.

Then, there are two chloride ions per molecule, so double the number of moles.

Molarity= moles of chloride ions/1.5

Answer 2

0.700