SC2 – O’Malley SAT II Review (Solutions) For – 2: a Molarity b Formality c Density d Molality e Normality Which is defined as moles of solute per kilogram of solvent? Which is defined as moles of solute per liter of solution? For – 6: a Solute b Solvent c Solubility d Aqueous solution e Solvation Which is present in a lesser amount in a solution? Which describes a species in which the solvent is water? Which is present in greater quantity in solution? Which is the interaction between the solute and the solvent molecules? For – 9: a Dilute b Concentrated c Unsaturated d Saturated e Supersaturated Which is the condition, unrelated to quantities, that indicates that the rate going into solution is equal to the rate coming out of solution? Which is the condition that exists when a water solution that has been at equilibrium is heated to a higher temperature with a higher solubility, but no additional solute is added? solute, compared with the amount of solvent, in a solution? For 10 – 11: a i, ii and iii b i and ii c ii and iii d i only e iii only 10 The ionization of salts in water is useful in explaining i Their unusually large solubility in water ii Their electrical conductivity in solution iii The lowered freezing points and increased boiling points of their solutions 11 Which of the following describe water? i Solvent for polar solutes ii Polar molecule iii Good conductor of electricity Q 12 13 14 15 16 17 Which is the descriptive term that indicates there is a large quantity of Statement I Because Statement II When a solute is added to pure water, the vapor Because All solutes dissociate into positive and negative ions pressure of the water will decrease NaCl(aq) is an electrolyte Because It forms ions in solution A salt dissolved in an organic solvent will be a good Because Salts will not dissolve appreciably in an organic solvent electrical conductor A super saturated solution of glucose in boiling water Because The solubility increases as the temperature decreases crystallizes as it cools Salt dissolved in water lowers the freezing point Because The change in freezing point is given by: Tf = iKfm Sodium chloride forms aqueous solution of ions Because The sodium has a +1 charge and the chloride has a -1 charge and they are hydrated by the water molecules 18 What is the molarity if a 500 mL solution contains 20 g of CaBr2? a 0.1 M b 0.2 M c 0.5 M d M e M 19 How many moles of sulfate ions are in 200 mL of a M sodium sulfate solution? a 0.2 mol b 0.4 mol c 0.6 mol d 0.8 mol e 1.0 mol 20 A 0.5 m solution could be prepared by dissolving 20 g NaOH in a 0.5 L water b 0.5 kg water c L water d kg water e L water 21 What volume of water would be needed to dilute 50 mL of a M HCl solution to M? a 25 mL b 50 mL c 75 mL d 100 mL e 150 mL 22 About how many grams of sodium chloride would be dissolved in water to form a 0.5 M solution in 500 mL solution? a b 29 c 14.5 d 58 e 112 23 A one liter solution of M NaOH can be prepared with a 20 g NaOH b 40 g NaOH c 60 g NaOH d 80 g NaOH e 100 g NaOH 24 What is the molarity of a 10 mL solution in which 3.7 g KCl are dissolved? a 0.05 M b 0.1 M c M d M e 10 M 25 A solution of 10 M NaOH was used to prepare L of 0.5 M NaOH How many mL of the original NaOH solution are needed? a 10 mL b 100 mL c 1000 mL d 200 mL e 2000 mL 26 A molal solution of NaCl results when 58.5 g of sodium chloride is dissolved in a One liter of water b 100 mL of water c one kilogram of water d 100 g of water e one cubic meter of water 27 A small crystal of NaCl is added to a sodium chloride solution resulting in the precipitation of more than gram of sodium chloride This solution had been a Unsaturated b Saturated c Supersaturated d Dilute e Concentrated 28 Sodium chloride would be most soluble in a Ether b Benzene c Water d Carbon tetrachloride e Gasoline 29 Which of the following would produce a highly conductive aqueous solution? a Cyclohexane b Hydrochloric acid c Benzene d Sucrose e Acetic acid 30 A 10% solution of HNO3 would be produced by dissolving 63 g HNO3 in how many mL water? a 100 b 300 c 567 d 630 e 1000 31 What is the boiling point of an aqueous solution containing 117 g NaCl in 1000 g H2O? Kb = 0.52 oC kg/mol a 98.96 oC b 99.48 oC c 100.52 oC d 101 04 oC e 102.08 oC 32 Which of the following sequences lists the relative sizes of particles in a water mixture from smallest to largest? a Solutions, suspensions, colloids b Solutions, colloids, suspensions c Colloids, solutions, suspensions d Colloids, suspensions, solutions e Suspensions, colloids, solutions 33 A compound which, when dissolved in water, barely conducts electrical current can probably be a A strong electrolyte b An ionic salt c A strong acid d A strong base e None of the above 34 How many grams of HCl must be added to 500 mL water to produce a solution that freezes at -1.86 oC? (molal freezing constant = 1.86 oC kg/mol) a 4.6 b 9.1 c 18.3 d 36.5 e 73.0 35 A solution can be both a Dilute and concentrated b Saturated and dilute c Saturated and unsaturated d Supersaturated and saturated e None of these 36 The solubility of a solute indicates a The temperature of the solution b The quantity of solvent c The quantity of solute d The nature of the solute & solvent e All of these 37 A 10% solution of NaCl means that in 100 g of solution there is a 5.85 g NaCl b 58.5 g NaCl c 10 g NaCl d 94 g NaCl 38 The molarity of a solution made by placing 98 g H2SO4 in sufficient water to make 500 mL of solution is a 0.5 b c d 39 If 684 g sucrose (MM = 342 g) is dissolved in 2000 g H2O (essentially L), what will be the freezing point of this solution? a -0.51 oC b -1.86 oC c -3.72 oC d -6.58 oC 40 Ten grams of sodium hydroxide dissolved in L of water makes a solution that is a 0.25 M b 0.5 M c M d 1.5 M e M 41 How much water, in liters, must be added to 0.5 L of M HCl to make it M? a 0.33 b 0.5 c d 1.5 e 42 How many grams of NaOH are needed to make 100 g of a % solution? a b c 20 d 40 e 95 43 What is the boiling point of water at the top of a mountain? a 100 oC b > 100 oC since the pressure is less than at ground level c < 100 oC since the pressure is less than at ground level d > 100 oC since the pressure is greater than at ground level e < 100 oC since the pressure is greater than at ground level 44 mol NaCl in 1000 g H2O will change the boiling point of water to a 100.51 oC b 101.04 oC c 101.53 oC d 101.86 oC e 103.62 oC 45 To what volume, in mL, must 50.0 mL of 3.50 M H2SO4 be diluted in order to make M H2SO4? a 25 b 60.1 c 87.5 d 93.2 e 101 46 What is the molar mass of a non-ionizing solid if 10 g of this solid, dissolved in 100 g of water, formed a solution that froze at 1.21 oC? a 0.65 g b 6.5 g c 130 g d 154 g e 265 g 47 What is the melting point of 0.2 L water containing 6.20 g C2H6O2? a -1.86 oC b -0.93 oC c oC d 0.93 oC e 1.86 oC 48 Which of the following are TRUE? i Adding a solute raises the vapor pressure & boiling point ii The change in boiling & freezing point depends on molality iii The number of solute particles in a solvent is an important factor in determining the boiling point elevation a i only b ii only c i and ii d ii and iii e i, ii and iii Answers: 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 D A A D B E D C B A B TF T T CE FT TF T T CE T T CE B B D D C D D B C C C B C E B E B B E C C B A C B C B C D B D