# Physical Science

## Chapter 22: Solutions

### Standardized Test Practice

 1. How much sodium chlorate will you have to add to 100 g of water at 50°C to make a saturated solution? (13.0K) A) 80 g B) 157 g C) 200 g D) 123 g 2. If 75 g of potassium bromide are dissolved in 100 g of water at 50°C, how would you describe the solution? (13.0K) A) dilute B) saturated C) concentrated D) supersaturated 3. Which of the following will make a supersaturated solution if added to 100 g of water? (13.0K) A) 30 g of NaCl if the water is 50°C B) 100 g of KBr if the water is 90°C C) 80 g of NaClO3 if the water is 30°C D) 60 g of KNO3 if the water is 100°C 4. Which of the following statements about solubility is generally true as the temperature decreases? A) The solubility of gases increases, while the solubility of solids decreases. B) The solubility of gases decreases, while the solubility of solids increases. C) The solubility of both gases and solids increases. D) The solubility of both gases and solids decreases. 5. This illustration indicates what effect of solutes on freezing point? (16.0K) A) Freezing point is lower because the freezing point of the solute is lower than that of water. B) Freezing point is lower because solute particles interfere with crystal formation. C) Freezing point is raised because solute particles aid crystal formation. D) Freezing point is raised because solute freezing point is higher than that of water. 6. Which of these elements is most likely to form an ionic bond with potassium? (16.0K) A) argon B) chlorine C) phosphorus D) sulfur 7. Which of the following will make a large crystal of rock salt dissolve faster in water? A) cooling B) using less water C) shaking D) using a larger salt crystal 8. Which of the following statements is true about how using smaller salt crystals would affect the rate of making a salt solution in water? A) Smaller crystals increase the surface area and slow down dissolving. B) Smaller crystals decrease the surface area and speed up dissolving. C) Smaller crystals increase the surface area and speed up dissolving. D) Smaller crystals decrease the surface area and slow down dissolving. 9. A solution of one solid metal in another is called a(n) A) mixture. B) alloy. C) supersaturated solution. D) crystal. 10. An aqueous solution of which of these substances will conduct an electric current? A) ethyl alcohol B) sucrose C) potassium sulfate D) oxygen