Name_______________________________ Date__________________ Period______________ Solutions Exam Study Guide Directions: Read each of the following questions. Answer in the space provided. If a calculation is required, SHOW ALL WORK TO RECEIVE CREDIT FOR THE ANSWER. Solutions 1. What is a solution? 2. What type of solution contains the maximum amount of dissolved solute? _________________ 3. What type of solution contains less than the maximum amount of dissolved solute _________________ 4. What type of solution contains more than the maximum amount of dissolved solute ________________ 5. What is a precipitate? Where would I expect to find it in my solution ? 6. What happens to the solubility of a solid in a solution as the temperature increases? 7. What happen to the solubility of a gas in a solution as the temperature increase? 8. Define the word solute 9. Define the word solvent 10. If you dissolve salt in water, which is the solute and which is the solvent? a. Solute _________ b. Solvent ____________ 11. If you have 25g of sugar in 175g of water, which is the solute and which is the solvent? a. Solute ___________ b. Solvent ____________ 12. Two liquids that dissolve in each other are said to be ___________________. 13. Two liquids that will not dissolve in each other are said to be___________________. 14. Define solubility. 15. What factors affect solubility? 16. What does it mean to have a concentrated solution? 17. What does it mean to have a dilute solution? 18. Define miscible and immiscible Molarity 19. Define Molarity. What is the formula? 20. If 12.0 moles of sugar are in a solution of 25.0 L. What is the molarity of this sugar solution? 21. 18 moles of sugar are in a solution of 49 L. What is the molarity of this sugar solution? 22. If 30 g of NaCl is dissolved in 500 mL of water, what is the molarity? 23. Calculate the molarity of a solution that contains 5.7 moles of NaI in 400mL of H20 Preparing Solutions 24. How many moles of solute is required to make 4 liters of a 6M solution? 25. How many grams are required to make a 500 ml of a 4M solution of NaCl? 26. How many moles of glucose C6H12O6 are needed to make 200 mL of a 4.5 M solution Solubility Curve 27. On a solubility curve what does the x-axis represent? What does the y axis represent? 28. Where are saturated, unsaturated and supersaturated solutions found on a solubility graph? 29. Which solute is most soluble at 20ºC? _______ 30. Which solute is least soluble at 20ºC? __________ 31. How many grams of KNO3 will dissolve in 100g of water at 60ºC? 32. What mass of NaNO3 will dissolve in water at 10ºC? 33. If 50g of NH4Cl is dissolved in 100.g of H2O at 90ºC, how many additional grams of NH4Cl must be added to make a saturated solution? 34. If 120g of KNO3 is added to a 100ml of water at 50 ºC, how many grams will remain undissolved at the bottom? 35. Why is water called the universal solvent? 36. Which substance(s) on the graph are gases? How do you know? 37. Which solute is most soluble at 90 ºC? __________________________ 38. Which solute is least soluble at 0 ºC? __________________________ Colligative properties 39. Define colligative properties 40. What are the three most important ones we discussed in class? Explain what happens in each 41. Salt placed on an icy sidewalk causes the ice to melt. What is the melting a result of? 42. The boiling point of a solution will be ___________________ than that of a pure solvent. 43. The freezing point of a solution will be _______________ than that of a pure solvent. 44. The vapor-pressure of a solution will be _______________ than that of a pure solvent. Percent by mass/volume 45. What is the percent by mass of 32.8g of iron (II) sulfate dissolved in 89.0 g of water? 46. A solution is made by adding 57 mL of benzene to 143 mL of toluene. What is the percent by volume of benzene? 47. An experiment requires a solution that is 87 %sodium chloride by volume. What volume of sodium chloride should be added to 370 mL of water to make this solution? 48. An experiment requires a solution that is 74% methyl alcohol by volume. What volume of methyl alcohol should be added to 330 mL of water to make this solution?