VIEWS: 0 PAGES: 3 POSTED ON: 5/1/2012 Public Domain
Name ___________________________________ Date ___________ Class _______ Chapter 15 & 16 Review Sheet: Solutions & Colligative Properties 1. What are the two types of mixtures? Explain the differences between them. 2. What is another name for a solution? What are the types of solutions and what are the differences? 3. What is the Tyndall effect? 4. What is an electrolyte? Why does it conduct electricity? What are some examples? What is a non-electrolyte? What are some examples? 5. What is a solute? What is a solvent? Give an example of a solution and identify the solute and solvent. 6. How can you make a solute dissolve faster? Explain why each of these ways increase the rate of solution. 7. Explain the differences between the following: a. dilute and concentrated b. saturated and unsaturated c. What is supersaturated? 8. What happens to the solubility of solids or liquids as the temperature rises? How are gases different? 9. What does the expression “like dissolves like” refer to? 10. What does molarity mean? What does molality mean? What do they both measure? Calculations Calculate the molarities of the following solutions: 11) 2.3 moles of sodium chloride in 0.45 liters of solution. 12) 1.2 moles of calcium carbonate in 1.22 liters of solution. 13) 98 grams of sodium hydroxide in 2.2 liters of solution. 14) 1.2 grams of hydrochloric acid in 25 mL of solution. Explain how you would make the following solutions. You should tell how many grams of the substance you need to make the solution, not how many moles when necessary(15-17). 15) 2.0 L of 6.0 M HCl 16) 5.0 L of 9.0 M NaOH diluted to 2.0 M NaOH 17) 0.75 L of 0.25 M Na2SO4 18) How many liters of 3.4 M solution can be made using 78 grams of isopropanol (C3H8O)? 19) What is the concentration of a solution with a volume of 3.3 mL that contains 12 grams of ammonium sulfite? 20) I add 1.65 L of water to 112 grams of sodium acetate, what is the molality of NaC2H3O2 in this solution? 21) If 75.0 mL of 5.0M nitric acid is diluted to 315 mL, what is the concentration of the new solution? 22) What volume of concentrated 18M H2SO4 is required to prepare 525 mL of a 7.0M solution? 23) A solution is prepared by mixing 16mL heptane (C7H16, d=0.684 g/cm3) with 62 mL of hexane (C6H14, d= 0.66 g/cm3). Assuming that the volumes add on mixing, calculate the mass percent, molality, and molarity. CHEM Review Chilton Calculations – Answer Key Calculate the molarities of the following solutions: 11) 2.3 moles of sodium chloride in 0.45 liters of solution. 5.1 M NaCl 12) 1.2 moles of calcium carbonate in 1.22 liters of solution. 0.98 M CaCO3 13) 98 grams of sodium hydroxide in 2.2 liters of solution. 1.1 M NaOH 14) 1.2 grams of hydrochloric acid in 25 mL of solution. 1.3 M HCl Explain how you would make the following solutions. 15) 2.0 L of 6.0 M HCl Dissolve 440 g HCl in water, dilute to a final volume of 2.0 L 16) 5.0 L of 9.0 M NaOH diluted to 2.0 M NaOH Use 5.0L of 9.0 M NaOH and add water to dilute to a final volume of 23 L 17) 0.75 L of 0.25 M Na2SO4 Dissolve 27 g Na2SO4 in water, dilute to a final volume of 0.75 L 18) How many liters of 3.4 M solution can be made using 78 grams of isopropanol (C3H8O)? 0.38 L solution 19) What is the concentration of a solution containing 3.3 mL of solvent and 12 grams of ammonium sulfite? 31 M (NH4)2SO3 20) If I add 1.65 L of water to 112 grams of sodium acetate what is the molality of NaC2H3O2 in this solution? 0.827 m NaC2H3O2 21) If 75.0 mL of 5.0M nitric acid is diluted to 315 mL, what is the concentration of the new solution?, 1.2 M HNO3 22) What volume of concentrated 18M H2SO4 is required to prepare 525 mL of a 7.0M solution?, 0.20L of 18M H2SO4 23) A solution is prepared by mixing 16mL heptane (C7H16, d=0.684 g/cm3) with 62 mL of hexane (C6H14, d= 0.66 g/cm3). Assuming that the volumes add on mixing, calculate the mass percent, molality, and molarity. 21% heptane (%(m/m)), 2.7 m, 1.4 M CHEM Review Chilton