Chemistry Molarity Solution: A solution containing equal masses of glycerol (C3...

🤓 Based on our data, we think this question is relevant for Professor Bindell's class at UCF.

Solution: A solution containing equal masses of glycerol (C3H8O3) and water has a density of 1.10 g/mL. Calculate the molarity of glycerol in the solution.

Problem

A solution containing equal masses of glycerol (C3H8O3) and water has a density of 1.10 g/mL. Calculate the molarity of glycerol in the solution.


Solution

We’re being asked to calculate the molarity (M) of glycerol (C3H8O3) in a solution. Recall that molarity is the ratio of the moles of solute and the volume of solution (in liters). In other words:



We first need to determine the number of moles of C3H8O3. Assuming that we have 100 g of solution, this means we have 50 g of C3H8O3 and 50 g H2O.


To find the moles of C3H8O3, we’ll need its molar mass. The molar mass of C3H8O3 is:

C3H8O3     3 C × 12 g/mol C = 36 g/mol

                  8 H × 1 g/mol H = 8 g/mol        

                  3 O × 61 g/mol O = 48 g/mol     

  Sum = 92 g/mol

Solution BlurView Complete Written Solution