Draw the molecular picture that shows the particles present in water when CH3CHO is dissolved in water at room temperature.

Describe the changes that occur between the time excess solute is placed into water and the time the solution becomes saturated.

Cooking A cook prepares a solution for boiling by adding12.5 g of NaCl to a pot holding 0.750 L of water. Atwhat temperature should the solution in the pot boil?Use Table 14.5 for needed data.

. The “Chemistry in Focus” segment Water, Water Everywhere, Bu . . . discusses the desalinization of ocean water. Explain why many sails are soluble in water. Include molecular-level diagrams in your answer.

When you heat water on a stove, small bubbles appear long before the water begins to boil. What are they? Explain why they appear.

6-20 Give a familiar example of solutions of each of these types: (a) Liquid in liquid (b) Solid in liquid (c) Gas in liquid (d) Gas in gas

Classify each of the following solutions as saturated, unsaturated, or supersaturated based on the following observations made after adding a small piece of solid solute to the solution. a. The added solute rapidly dissolves. b. The added solute falls to the bottom of the container where it remains without any decrease in size. c. The added solute falls to the bottom of the container where it decreases in size for several hours and thereafter its size remains constant. d. The added solute causes the production of a large amount of solid white crystals.

6-19 In each of the following, tell whether the solutes and solvents are gases, liquids, or solids. (a) Bronze (see Chemical Connections 2E) (b) Cup of coffee (c) Car exhaust (d) Champagne