A student adds 68.4 g of sucrose (C₁₂H₂₂O₁₁) to 750 mL of 20°C water. She stirs the solution until all of the sucrose crystals dissolve. She then transfers the solution to a volumetric flask and fills it to the 1.00 L mark with 20°C water. What is the molarity of the sucrose solution the student prepared?

Question

Quizplus · Accepted Answer

The molarity (M) is calculated by dividing the moles of solute by the liters of solution. The molar mass of sucrose is approximately 342.3 g/mol. Thus, 68.4 g of sucrose is 0.2 moles (68.4 g / 342.3 g/mol). The total volume of the solution is 1.00 L, so the molarity is 0.2 moles / 1.00 L = 0.20 M.

A Student Adds 68