AP practice test ch 11

# AP practice test ch 11 - Name Date 1 A solution of hydrogen...

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Name: __________________________ Date: _____________ 1. A solution of hydrogen peroxide is 26.8% H 2 O 2 by mass and has a density of 1.11 g/cm 3 . The molarity of the solution is: A) 8.21 M B) 0.297 M C) 8.75 M D) 9.1 M E) none of these 2. Calculate the molality of C 2 H 5 OH in a water solution that is prepared by mixing 50.0 mL of C 2 H 5 OH with 121.6 mL of H 2 O at 20 o C. The density of the C 2 H 5 OH is 0.789 g/mL at 20 o C. A) 0.00704 m B) 9.6 m C) 0.142 m D) 7.04 m E) none of these 3. What is the molality of a solution of 50.9 g of propanol (CH 3 CH 2 CH 2 OH) in 152 mL water, if the density of water is 1.00 g/mL? A) 5.57 m B) 0.00557 m C) 0.179 m D) 8.47e–1 m E) none of these 4. A solution containing 404.1 g of Mg(NO 3 ) 2 per liter has a density of 1.114 g/mL. The molarity of the solution is: A) 2.724 M B) 2.446 M C) 8.173 M D) 3.035 M E) none of these Page 1

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5. A solution containing 292 g of Mg(NO 3 ) 2 per liter has a density of 1.108 g/mL. The molality of the solution is: A) 2.00 m B) 2.41 m C) 5.50 m D) 6.39 m E) none of these 6. How many milliliters of 18.8 M H 2 SO 4 are needed to prepare 600.0 mL of 0.10 M H 2 SO 4 ? A) 313 mL B) 113 mL C) 3.3 mL D) 1.6 mL E) 4.2 mL 7. A 20.0-g sample of methyl alcohol (CH 3 OH, molar mass = 32.0 g/mol) was dissolved in 24.2 g of water. The mole fraction of CH 3 OH is: A) 0.465 B) 0.624 C) 0.452 D) 3.15 E) 0.317 8. Which of the following concentration measures will change in value as the temperature of a solution changes? A)
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AP practice test ch 11 - Name Date 1 A solution of hydrogen...

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