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

2.86mol/L

Step-by-step 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 =
`(number of moles )/(volume)`

Insert the parameters and solve;

Molarity =
`(7.15)/(2.5)` = 2.86mol/L