In a problem a student is given the amount of solute in grams and the volume of the solution in milliliters. What must be done with the information before the molarity can be calculated?

1 Answer
Jun 26, 2018

The molar mass of the solute... and some other conversions.

Explanation:

Molarity is given by the equation:

#n=c/v#

where:

  • #n# is the molarity of the solution in terms of molarity

  • #c# is the number of moles of the solute

  • #v# is the volume of the solution in liters

First, the student must convert mililliters to liters. This is done by dividing the number of milliliters by #1000#. Then, the student must also know the molar mass of the solute.

The student then divides the mass of the solute given by the molar mass, and gets the number of moles of the solute. Now, it is easy to calculate the molarity of the solution. Just plug the known values into the equation and you're done!