EXam 5 Ch.13 Chemistry

59) What is the molarity of a hydrochloric acid solution prepared by diluting 200.0 mL of 0.500 M HCl to a total volume of 1.00 L? A) 0.100 M B) 0.200 M C) 0.250 M D) 1.00 M E) 2.50 M

A) 0.100 M

48) What is the molarity of a saline solution that contains 0.900 g NaCl (58.44 g/mol) dissolved in 100.0 mL of solution? A) 0.154 M B) 0.527 M C) 1.54 M D) 1.90 M E) 5.27 M

A) 0.154 M

1) What is the approximate concentration of fluoride in fluoridated water? A) 1 ppm B) 10 ppm C) 100 ppm D) 1000 ppm E) 10,000 ppm

A) 1 ppm

42) Permanent antifreeze contains ethylene glycol dissolved in water. What is the mass of ethylene glycol dissolved in 5.00 kg of a 40.0% solution? A) 2.00 kg B) 3.33 kg C) 7.5 kg D) 12.5 kg E) 200 kg

A) 2.00 kg

52) What is the mass of barium hydroxide (171.35 g/mol) dissolved in 0.500 L of 0.100 M Ba(OH)2 solution? A) 8.57 g B) 17.1 g C) 85.7 g D) 171 g E) 857 g

A) 8.57 g

73) Which of the following explains why bubbles form on the inside of a pan of water when the pan of water is heated? A) As temperature increases, the solubility of air is less. B) As temperature increases, the kinetic energy decreases. C) As temperature increases, the vapor pressure increases. D) As temperature increases, the atmospheric pressure decreases. E) none of the above

A) As temperature increases, the solubility of air is less.

30) Why does grinding solid crystals increase the rate of dissolving for a solid solute in water? A) Smaller crystals have more surface area. B) Smaller crystals have more energy. C) Smaller crystals are more nonpolar. D) Smaller crystals are more polar. E) none of the above

A) Smaller crystals have more surface area

24) When fructose crystals, C6H12O6, dissolve in water, which of the following is formed in solution? A) hydrated clusters of C6H12O6 B) hydrated clusters of CO2 C) hydrated clusters of H2O D) hydrated clusters of H2CO3 E) none of the above

A) hydrated clusters of C6H12O6

23) When vitamin C crystals, C6H8O6, dissolve in water, which of the following is formed in solution? A) hydrated clusters of C6H8O6 B) hydrated clusters of CO2 C) hydrated clusters of H2O D) hydrated clusters of H2CO3 E) none of the above

A) hydrated clusters of C6H8O6

22) When citric acid crystals, C6H8O7, dissolve in water, which of the following is formed in solution? A) hydrated clusters of C6H8O7 B) hydrated clusters of CO2 C) hydrated clusters of H2O D) hydrated clusters of H2CO3 E) none of the above

A) hydrated clusters of C6H8O7

3) Yeast and sugar are added to champagne to give the sparkle of carbonation. Under what conditions is carbon dioxide gas most soluble? A) low temperature, high pressure B) low temperature, low pressure C) high temperature, low pressure D) high temperature, high pressure E) none of the above

A) low temperature, high pressure

21) Apply the like dissolves like rule to predict which of the following vitamins is insoluble in water. A) retinol, C20H30O B) thiamine, C12H17N4OS C) niacinamide, C6H6N2O D) pyridoxine, C8H11NO3 E) cyanocobalamin, C63H88CoN14O14P

A) retinol, C20H30O

81) A 10.0 mL solution of glucose, C6H12O6 (180.18 g/mol), with a mass of 10.483 g, is evaporated to dryness. If the solid white residue has a mass of 0.524 g, what is the mass/mass percent concentration and molarity of the sugar solution? A) 5.00% and 0.277 M B) 5.00% and 0.291 M C) 5.00% and 0.582 M D) 5.24% and 0.277 M E) 5.24% and 0.291 M

B) 5.00% and 0.291 M

33) If 25.0 mL of seawater has a mass of 25.895 g and contains 1.295 g of solute, what is the mass/mass percent concentration of solute in the seawater sample? A) 3.862% B) 5.001% C) 5.18% D) 20.00% E) 96.5%

B) 5.001%

41) What is the mass of solute dissolved in 50.0 g of 12.5% saline solution? A) 4.00 g B) 6.25 g C) 7.14 g D) 43.8 g E) 625 g

B) 6.25 g

32) If 25.0 mL of urine has a mass of 25.725 g and contains 1.929 g of solute, what is the mass/mass percent concentration of solute in the urine sample? A) 3.887% B) 7.499% C) 7.72% D) 13.34% E) 97.2%

B) 7.499%

55) What is the volume of 12.0 M hydrochloric acid that contains 3.646 g of HCl solute (36.46 g/mol)? A) 1.20 mL B) 8.33 mL C) 83.3 mL D) 120 mL E) 833 mL

B) 8.33 mL

31) If 10.0 mL of blood plasma has a mass of 10.279 g and contains 0.870 g of protein, what is the mass/mass percent concentration of protein in the blood plasma? A) 0.870% B) 8.46% C) 8.70% D) 32.1% E) 97.3%

B) 8.46%

1) Coca-Cola is carbonated by injection with carbon dioxide gas. Under what conditions is carbon dioxide gas most soluble? A) low temperature, low pressure B) low temperature, high pressure C) high temperature, high pressure D) high temperature, low pressure E) none of the above

B) low temperature, high pressure

83) After fasting overnight, a patient's normal blood glucose level is 70-90 mg/dL. Express this range as mass/mass percent concentration. (Assume the density of blood is 1.0 g/mL.) A) 7-9% B) 0.7-0.9% C) 0.07-0.09% D) 0.007-0.009% E) 0.0007-0.0009%

C) 0.07-0.09%

67) What is the molarity of aqueous silver nitrate if 50.0 mL of AgNO3 reacts with 25.0 mL of 0.100 M K2CrO4? 2 AgNO3(aq) + K2CrO4(aq) → Ag2CrO4(s) + 2 KNO3(aq) A) 0.0250 M B) 0.0500 M C) 0.100 M D) 0.200 M E) 0.400 M

C) 0.100 M

85) An hour after a meal, a patient's blood glucose level is 180 mg/dL. Express this glucose level as mass/mass percent concentration. (Assume the density of blood is 1.0g/mL.) A) 18% B) 1.8% C) 0.18% D) 0.018% E) 0.0018%

C) 0.18%

47) What is the molarity of a sucrose solution that contains 10.0 g of C12H22O11 (342.34 g/mol) dissolved in 100.0 mL of solution? A) 0.00292 M B) 0.0292 M C) 0.292 M D) 3.42 M E) 34.2 M

C) 0.292 M

46) What is the molarity of a glucose solution that contains 10.0 g of C6H12O6 (180.18 g/mol) dissolved in 100.0 mL of solution? A) 0.00555 M B) 0.0555 M C) 0.555 M D) 1.80 M E) 18.0 M

C) 0.555 M

58) What is the molarity of a hydrochloric acid solution prepared by diluting 250.0 mL of 6.00 M HCl to a total volume of 2.50 L? A) 0.0600 M B) 0.250 M C) 0.600 M D) 2.50 M E) 6.00 M

C) 0.600 M

71) If 37.5 mL of 0.100 M calcium chloride reacts completely with aqueous silver nitrate, what is the mass of AgCl (143.32 g/mol) precipitate? CaCl2(aq) + 2 AgNO3(aq) → 2 AgCl(s) + Ca(NO3)3(aq) A) 0.269 g B) 0.537 g C) 1.07 g D) 537 g E) 269 g

C) 1.07 g

53) What is the mass of zinc acetate (183.49 g/mol) dissolved in 0.200 L of 0.500 M Zn(C2H3O2)2 solution? A) 1.83 g B) 12.4 g C) 18.3 g D) 36.7 g E) 91.7 g

C) 18.3 g

65) What volume of 0.115 M hydrochloric acid reacts completely with 0.125 g of sodium carbonate, Na2CO3 (105.99 g/mol)? Na2CO3(s) + 2 HCl(aq) → Na2SO4(aq) + 2 H2O(l) + 2 CO2(g) A) 9.75 mL B) 10.3 mL C) 20.5 mL D) 41.0 mL E) 97.5 mL

C) 20.5 mL

44) What is the mass of water required to prepare 250.0 g of 10.0% copper(II) sulfate solution? A) 25.0 g B) 27.8 g C) 225 g D) 278 g E) 2250 g

C) 225 g

57) What is the volume of 3.00 M sulfuric acid that contains 9.809 g of H2SO4 solute (98.09 g/mol)? A) 0.300 mL B) 30.0 mL C) 33.3 mL D) 333 mL E) 3330 mL

C) 33.3 mL

45) What is the mass of water required to prepare 5.25 kg of 15.0% calcium nitrate solution? A) 0.788 kg B) 0.926 kg C) 4.46 kg D) 6.18 kg E) 29.8 kg

C) 4.46 kg

61) What volume of 12 M acid must be diluted with distilled water to prepare 5.0 L of 0.10 M acid? A) 0.042 mL B) 6 mL C) 42 mL D) 60 mL E) 420 mL

C) 42 mL

43) What is the mass of water required to prepare 50.0 g of 10.0% sodium nitrate solution? A) 5.00 g B) 5.56 g C) 45.0 g D) 55.6 g E) 450 g

C) 45.0 g

5) Which of the following illustrates the like dissolves like rule for two liquids? A) A polar solute is miscible with a nonpolar solvent. B) A polar solute is immiscible with a polar solvent. C) A nonpolar solute is miscible with a nonpolar solvent. D) A nonpolar solvent is miscible with a polar solvent. E) none of the above

C) A nonpolar solute is miscible with a nonpolar solvent

5) Why is fluoride beneficial for developing cavity-free teeth? A) Fluoride converts tooth enamel to CaF2. B) Fluoride converts tooth enamel to SnF2. C) Fluoride converts tooth enamel to Ca10(PO4)6F2. D) Fluoride converts tooth enamel to Ca10(PO4)6(OH)2. E) none of the above

C) Fluoride converts tooth enamel to Ca10(PO4)6F2.

87) Which of the following best explains why peanut butter can remove grease from soiled clothing? A) Peanut butter and grease are both organic. B) Peanut butter and grease are both polar. C) Peanut butter and grease are both nonpolar. D) Peanut butter is polar and grease is nonpolar. E) Peanut butter is nonpolar and grease is polar.

C) Peanut butter and grease are both nonpolar

69) What is the molarity of aqueous potassium hydroxide if 42.5 mL of KOH reacts with 25.0 mL of 0.100 M H3PO4? H3PO4(aq) + 3 KOH(aq) → K3PO4(aq) + 3 H2O(l) A) 0.0196 M B) 0.0567 M C) 0.0588 M D) 0.176 M E) 0.510M

D) 0.176 M

63) What volume of 18 M acid must be diluted with distilled water to prepare 500.0 mL of 0.50 M acid? A) 0.014 mL B) 0.14 mL C) 1.4 mL D) 14 mL E) 140 mL Answer:

D) 14 mL

62) What volume of 16 M acid must be diluted with distilled water to prepare 500.0 mL of 0.50 M acid? A) 0.016 mL B) 0.16 mL C) 1.6 mL D) 16 mL E) 160 mL

D) 16 mL

37) What is the mass of a 10.0% blood plasma sample that contains 2.50 g of dissolved solute? A) 0.250 g B) 0.278 g C) 22.5 g D) 25.0 g E) 250 g

D) 25.0 g

3) In 2000, how many of the 50 largest cities in the United States had drinking water that was naturally or artificially fluoridated? A) 2 B) 10 C) 25 D) 42 E) 50

D) 42

2) What is the approximate percentage of the population in the United States who drink water that is naturally or artificially fluoridated? A) 1% B) 10% C) 50% D) 67% E) 100%

D) 67%

39) What is the mass of a 12.5% blood plasma sample that contains 10.0 g of dissolved solute? A) 1.25 g B) 1.43 g C) 70.0 g D) 80.0 g E) 125 g

D) 80.0 g

15) Which of the following illustrates the like dissolves like rule for a solid solute in a liquid solvent? A) An ionic compound is soluble in a nonpolar solvent. B) A polar compound is soluble in a nonpolar solvent. C) A nonpolar compound is soluble in a polar solvent. D) A nonpolar compound is soluble in a nonpolar solvent. E) none of the above

D) A nonpolar compound is soluble in a nonpolar solvent.

4) What is the formula for hydroxyapatite, which is found in tooth enamel and is the hardest substance in the human body? A) CaF2 B) Ca3(PO4)2 C) Ca10(PO4)6F2 D) Ca10(PO4)6(OH)2 E) none of the above

D) Ca10(PO4)6(OH)2

88) Which of the following best explains why soap and water remove grease? A) Soap molecules are large polymers that absorb grease. B) Soap molecules are nonpolar and dissolve in grease. C) Soap molecules are ionic and attracted to grease. D) Soap molecules have ionic "heads" that dissolve in water and nonpolar "tails" that dissolve in grease. E) Soap molecules have ionic "heads" that dissolve in grease and nonpolar "tails" that dissolve in water.

D) Soap molecules have ionic "heads" that dissolve in water and nonpolar "tails" that dissolve in grease.

11) Apply the like dissolves like rule to predict which of the following liquids is miscible with liquid bromine, Br2. A) heptane, C7H16 B) methylene chloride, CH2Cl2 C) xylene, C8H10 D) all of the above E) none of the above

D) all of the above

13) Which of the following illustrates the like dissolves like rule for a solid solute in a liquid solvent? A) An ionic compound is soluble in a polar solvent. B) A polar compound is soluble in a polar solvent. C) A nonpolar compound is soluble in a nonpolar solvent. D) all of the above E) none of the above

D) all of the above

28) Which of the following increases the rate of dissolving for a solid solute in a solvent? A) grinding the solute B) heating the solution C) stirring the solution D) all of the above E) none of the above

D) all of the above

4) Which of the following illustrates the like dissolves like rule for two liquids? A) A polar solute is miscible with a polar solvent B) A nonpolar solute is miscible with a nonpolar solvent C) A polar solute is immiscible with a nonpolar solvent D) all of the above E) none of the above

D) all of the above

7) Apply the like dissolves like rule to predict which of the following liquids is miscible with water. A) formic acid, HCHO2 B) glycerin, C3H5(OH)3 C) methyl ethyl ketone, C4H8O D) all of the above E) none of the above

D) all of the above

2) Pepsi-Cola is carbonated by injection with carbon dioxide gas. Under what conditions is carbon dioxide gas least soluble? A) low temperature, low pressure B) low temperature, high pressure C) high temperature, high pressure D) high temperature, low pressure E) none of the above

D) high temperature, low pressure

77) Which of the following properties must be similar for two liquids to be soluble? A) boiling point B) density C) molar mass D) polarity E) reactivity

D) polarity

75) If the solubility of nitrogen in blood is 1.90 cc per 100 cc at 1.00 atmosphere, what is the solubility of nitrogen in a scuba diver's blood at a depth of 150 feet where the pressure is 5.55 atmospheres? A) 0.190 cc/100 cc B) 0.380 cc/100 cc C) 1.90 cc/100 cc D) 3.80 cc/100 cc E) 10.5 cc/100 cc

E) 10.5 cc/100 cc

38) What is the mass of a 7.50% urine sample that contains 122 g of dissolved solute? A) 9.15 g B) 9.89 g C) 915 g D) 1500 g E) 1630 g

E) 1630 g

19) Apply the like dissolves like rule to predict which of the following vitamins is soluble in water. A) thiamine, C12H17N4OS B) riboflavin, C17H20N4O6 C) niacinamide, C6H6N2O D) cyanocobalamin, C63H88CoN14O14P E) all of the above

E) all of the above

6) What are alternate sources for fluoride besides fluoridated water? A) fluoride tablets B) fluoride toothpaste C) fluoride mouthwash D) fluoride treatments by a dentist E) all of the above

E) all of the above

78) Predict which of the following is a fat-soluble vitamin. A) retinol, vitamin A, C20H30O B) calciferol, vitamin D, C27H44O C) α-tocopherol, vitamin E, C29H50O2 D) vitamin K, C31H46O2 E) all of the above

E) all of the above

79) Predict which of the following is a water-soluble vitamin. A) niacinamide, vitamin B3, C6H6N2O B) pyridoxine, vitamin B6, C8H11NO3 C) cyanocobalamin, vitamin B12, C63H88CoN14O14P D) ascorbic acid, vitamin C, C6H8O6 E) all of the above

E) all of the above

17) Apply the like dissolves like rule to predict which of the following solids is soluble in hexane, C6H14. A) potassium iodide, KI B) potassium iodite, KIO2 C) potassium iodate, KIO3 D) potassium periodate, KIO4 E) iodine, I2

E) iodine, I2

29) Which of the following decreases the rate of dissolving for a solid solute in a solvent? A) grinding the solute B) heating the solution C) stirring the solution D) all of the above E) none of the above

E) none of the above

9) Apply the like dissolves like rule to predict which of the following liquids is immiscible with water. A) acetic acid, CH3COOH B) acetone, C3H6O C) methanol, CH3OH D) all of the above E) none of the above

E) none of the above

56) What is the volume of 6.00 M nitric acid that contains 6.302 g of HNO3 solute (63.02 g/mol)? A) 0.600 mL B) 16.7 mL C) 60.0 mL D) 167 mL E) 1670 mL

B) 16.7 mL

60) What is the molarity of a hydrochloric acid solution prepared by diluting 500.0 mL of 1.00 M HCl to a total volume of 2.50 L? A) 0.100 M B) 0.200 M C) 0.500 M D) 2.00 M E) 5.00 M

B) 0.200 M

54) What is the mass of nickel(II) nitrate (182.71 g/mol) dissolved in 25.0 mL of 0.100 M Ni(NO3)2 solution? A) 0.250 g B) 0.457 g C) 4.00 g D) 45.7 g E) 457 g

B) 0.457 g

40) What is the mass of solute dissolved in 10.0 g of 5.00% sugar solution? A) 0.180 g B) 0.500 g C) 0.900 g D) 9.50 g E) 10.0 g

B) 0.500 g