Question

An aqueous magnesium chloride solution is made by dissolving 7.15 moles of MgCl2 in sufficient water so that the final volume of the solution is 2.50 L . Calculate the molarity of the MgCl2 solution.

Answer 1

Answer:

2.86mol/L

Explanation:

Given parameters:

Number of moles of MgCl₂  = 7.15moles

Volume of solution  = 2.50L

Unknown:

Molarity of the MgCl₂ solution = ?

Solution:

The molarity of a solution is the number of moles of solute found in a given volume.

  Molarity  = $\frac{number of moles }{volume}$  

 Insert the parameters and solve;

   Molarity  = $\frac{7.15}{2.5}$   = 2.86mol/L