A sealed flask contains 0.0500 mol of a non-volatile
CHEMISTRY · Multi-part · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A sealed flask contains 0.0500 mol of a non-volatile, non-reactive solute dissolved in 200.0 mL of water. During a two-day period, some water slowly evaporates through a pin-hole leak in the stopper, reducing the solution volume to 175.0 mL while leaving the amount of solute unchanged.
(1) Qualitatively describe how the molarity of the solution is affected by the evaporation of water. Your explanation should reference the definition of molarity.
(2) Calculate the new molarity of the solution after the evaporation has occurred.
(3) Determine the percent increase in molarity relative to the original solution and interpret the physical significance of this change.