exam1fall2011f1 - GeneralChemistryI exam1 4/22/2011...

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General Chemistry I exam 1 4/22/2011 R. Lopez de la Vega Name_____________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following compounds will be most soluble in pentane (C 5 H 12 )? A) benzene (C 6 H 6 ) B) ethyl methyl ketone (CH 3 CH 2 COCH 3 ) C) acetic acid (CH 3 CO 2 H) D) pentanol (CH 3 CH 2 CH 2 CH 2 CH 2 OH) E) None of these compounds should be soluble in pentane. 1) 2) A solution containing less than the equilibrium amount is called __________. A) a concentrated solution B) an unsaturated solution C) a saturated solution D) a dilute solution E) a supersaturated solution 2) 3) Determine the solubility of CO 2 in soda water at 25°C if the pressure of CO 2 is 5.2 atm. The Henry ʹ s law constant for carbon dioxide in water at this temperature is 3.4 × 10 - 2 M/atm. A) 0.57 M B) 0.18 M C) 0.15 M D) 0.29 M E) 0.65 M 3) 4) Which of the following concentration units are temperature dependent? A) mole fraction B) mass percent C) molarity D) molality E) none of the above. 4) 5) Calculate the molality of a solution formed by dissolving 27.8 g of LiI in 500.0 mL of water. A) 0.394 m B) 0.556 m C) 0.241 m D) 0.254 m E) 0.415 m 5) 6) What mass of NaCl is contained in 24.88 g of a 15.00% by mass solution of NaCl in water? A) 21.15 g B) 20.00 g C) 3.73 g D) 12.44 g E) 1.50 g 6) 7) Determine the molality of an aqueous solution prepared by dissolving 0.112 moles of LiCl in 13.7 moles of H 2 O. A) 0.153 m B) 0.818 m C) 0.220 m D) 0.122 m E) 0.454 m 7) 8) A 1.00 L sample of water contains 0.0036 g of Cl ions. Determine the concentration of chloride ions in ppm if the density of the solution is 1.00 g/mL. A) 3.6 ppm
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This note was uploaded on 12/17/2011 for the course CHM 1046 taught by Professor Staff during the Fall '08 term at FIU.

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exam1fall2011f1 - GeneralChemistryI exam1 4/22/2011...

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