Solution WS I 1. Which will dissolve more rapidly? a) Sugar cubes in cold water b) Sugar cubes in hot water c) Powdered sugar in cold water d) Powdered sugar in hot water Benzene 2. Which will dissolve most slowly? a) Large salt crystals in stirred water b) Large salt crystal in unstirred water c) Small salt crystals in unstirred water d) Small salt crystals in stirred water 3. Which of the following will increase the solubility of most solid solutes? a) decreasing the temperature b) decreasing the amount of solvent at constant temperature c) increasing the amount of solute at constant temperature d) increasing the temperature 4. Which of the following are examples of a nonpolar compounds: a) Water b) Carbon tetrachloride c) benzene d) salt 5. What is the name for the dissolving medium? _____________________________________ 6. What is the name for the substance(s) dissolved? _____________________________________ 7. Which is the part of the solution in lesser quantity? Solute or 8. What is the solute in each of the following solutions? a. Salt water ______________________________ b. 40% ethanol in water ______________________________ c. 24 carat gold (24 parts Au to 1 part Cu) ______________________________ d. Air (78% nitrogen, 28% all other gases) ______________________________ 9. Why is water known as the “universal solvent”? 10. Determine whether each of the following are classified as heterogeneous/homogeneous. a. Chicken noodle soup _______________________________ b. Italian dressing _______________________________ c. Kool-aid _______________________________ d. Milk _______________________________ Solvent 11. Use the diagrams from above to predict the solubility of the given solutes. Use (s) for insoluble and (aq) for soluble. Solute Solvents Water CCl4 NaCl I2 Benzene KNO3 HCl 12. Classify the following solute-solvent mixtures as “soluble” or “insoluble” (like dissolves like): a. NaCl and Hexane (C6H14) b. Sucrose (C12H22O11) and Water c. Hexane and Benzene (C6H6) d. Acetone (C3H6O) and Ethanol (C2H6O) e. Iodine in Carbon Tetrachloride 13. Write the symbols for the following reaction and balance. Then place “(aq)” after every soluble compound and “(s)” after every insoluble compound, according to the solubility rules. a. potassium iodide + lead (II) acetate  b. silver nitrate + ammonium chloride  c. rubidium hydroxide + copper (II) chlorate  d. iron (III) cyanide + lithium carbonate 