Chemistry Quiz 8

Quiz 8 SolutionsHydrogen bonds between water molecules Your answer:cause surface tension on the water surfaceallows water to dissolve ionic and polar compoundsare attractions between a partially negative oxygen atom and a partially positive hydrogen atomall of the aboveA solution is made of 85.0 g of water and 5.0 g of NaCl. Your answer:The solute is water and the solvent is NaCl.The solute is NaCl and the solvent is the solution.The solute is NaCl and the solvent is water.Both NaCl and water are solutes.A strong electrolyte is a solute that Your answer:dissolves in water as molecules onlydissolves in water as ions onlydissolves in water as molecules and ionsdoes not dissolve in waterThe number of equivalents in 1.0 mole of Fe3+ is Your answer:0 equivalents1 equivalents3 equivalents2 equivalentsAt 40oC,KI has a solubility of 160 g KI per 100 g of water. How many grams of KI are needed to prepare a saturated solution using 25g of water? Your answer:160 g KI80 g KI40 g KI20 g KIA solution contains 15 g sucrose (table sugar) and 60 g of water. What is the mass/mass % of the sucrose solution? Your answer:80% (m/m) sucrose solution15 % (m/m) sucrose solution25% (m/m sucrose solution20 % (m/m) sucrose solutionHow many grams of NaOH are needed to prepare 400. mL of a 15%(m/v) NaOH solution? Your answer:15 g NaOH27 g NaOH38 g NaOH60. g NaOHHow many mL of a 5.0% glucose solution provide 80.0 g of glucose? Your answer:400 mL of 5.0% glucose solution1200 mL of 5.0% glucose solution100 mL of 5.0% glucose solution1600 mL of 5.0% glucose solutionWhat type of mixture contains solute particles that are retained by a semipermeable membrane, but do not settle out upon standing? Your answer:mixturecolloidalsuspensionsolutionA semipermeable membrane separates a 2% starch solution and an 8% starch solution. Your answer:Initially water will flow from the 2% starch solution to the 8% solution.The water level of the 8% solution will rise.The 8% starch solution will be diluted.All of the above.Red blood cells placed in a 5% NaCl solution will Your answer:not change in volume.hemolyze.dialyze.crenate.A 20.0 g sample of NaOH is used to make a 250 mL NaOH solution. What is the molarity of the NaOH solution? Your answer:8.0 M5.0 M2.0 M1.0 MHow many grams of NaCl are needed to prepare 0.500 L of a 4.00 M NaCl solution? Your answer:58.5 g NaCl117 g NaCl2.00 g NaCl4.00 g NaClHow many mL of 5.00 M HCl solution is needed to provide 1.5 mole of HCl? Your answer:333 mL1500 mL300 mL750 mLExpress the concentration of a 2.0 M NaOH solution as a mass/volume percent(%). Your answer:4.0 % (m/v) NaOH solution2.0 % (m/v) NaOH solution8.0 % (m/v) NaOH solution40% (m/v) NaOH solutionQuiz 8 Solutions Answers1) Hydrogen bonds between water molecules Correct Answer: all of the above2) A solution is made of 85.0 g of water and 5.0 g of NaCl. Correct Answer: The solute is NaCl and the solvent is water.3) A strong electrolyte is a solute that Correct Answer: dissolves in water as ions only4) The number of equivalents in 1.0 mole of Fe3+ is Correct Answer: 3 equivalents5) At 40oC,KI has a solubility of 160 g KI per 100 g of water. How many grams of KI are needed to prepare a saturated solution using 25g of water? Correct Answer: 40 g KI6) A solution contains 15 g sucrose (table sugar) and 60 g of water. What is the mass/mass % of the sucrose solution? Correct Answer: 20 % (m/m) sucrose solution7) How many grams of NaOH are needed to prepare 400. mL of a 15%(m/v) NaOH solution? Correct Answer: 60. g NaOH8) How many mL of a 5.0% glucose solution provide 80.0 g of glucose? Correct Answer: 1600 mL of 5.0% glucose solution9) What type of mixture contains solute particles that are retained by a semipermeable membrane, but do not settle out upon standing? Correct Answer: colloidal10) A semipermeable membrane separates a 2% starch solution and an 8% starch solution. Correct Answer: All of the above.11) Red blood cells placed in a 5% NaCl solution will Correct Answer: crenate.12) A 20.0 g sample of NaOH is used to make a 250 mL NaOH solution. What is the molarity of the NaOH solution? Correct Answer: 2.0 M13) How many grams of NaCl are needed to prepare 0.500 L of a 4.00 M NaCl solution? Correct Answer: 117 g NaCl14) How many mL of 5.00 M HCl solution is needed to provide 1.5 mole of HCl? Correct Answer: 300 mL15) Express the concentration of a 2.0 M NaOH solution as a mass/volume percent(%). Correct Answer: 8.0 % (m/v) NaOH solution