12.1 Types of Mixtures
1. Classify the following as either a heterogeneous or homogeneous mixture. Explain your answers.
a. orange juice
b. tap water
2. a. What are substances called whose water solutions conduct electricity?
b. Why does a salt solution conduct electricity?
c. Why does a sugar-water solution not conduct electricity?
3. Describe one way to prove that a mixture of sugar and water is a solution and that a mixture of sand and water is not a solution.
4. Name the solute and solvent in the following:
a. 14-karat gold
b. corn syrup
c. carbonated, or sparkling, water
12.2 The Solution Process
Why would you expect a packet of sugar to dissolve faster in hot tea than in iced tea?
a. Explain how you would prepare a saturated solution of sugar in water.
b. How would you then make it a supersaturated solution?
12.2 The Solution Process
Explain why ethanol will dissolve in water and carbon tetrachloride will not.
When a solute molecule is solvated, is energy released or absorbed?
12.3 Concentration of Solutions
What quantity represents the ratio of the number of moles of solute for a given volume of solution?
We dissolve 5.00 grams of sugar, C12H22O11, in water to make 1.000 L of solution. What is the concentration of this solution expressed as a molarity?