Chapter 10 quiz solutions

# 6 a substance that conducts electricitv when present

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6. A substance that conducts electricitv when present in an aqlsgLgion is called _ . a. a metallic.orF6ffi-- '- ':\ &) an_eJss.trelye. c. a nonelectrolyte. d. an element. e. none ofthe above. 1. Which of the following aqueous solutions will freeze at the lowest temperature? a. 0.10 nr KCI b. 0.20 m C6Hr206 (giucose; nonelectrolyte) c*., 0.050 m AlCl: U)0.15 llr SrBr2 e. All of the above freeze at the same temperature. int elevation? 8. What concentration unit is necessary for the calculation of boili

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\, a. @ c. d. e. molarity molalitv :J mass fraction mole fraction parts per million What concentration unit is necessary for the calculation of vaugr pressutaloU9ring? a. molarity b. molality c. mass fraction (0 mole fraction + e. density The boiling point elevation constant for water is 0.52"C1m. At what temperature will a mixture of 45'0 g of NaCl and 0.500 kg of water boil? a. 98.4oC b. 99.2.c c, 100.0"C d. 100.80c @ ror.o'c Which of the following statements concetning osmosis is/are CO-RRECT? A: Osmosis involves the movement of a 6lfent through a semipermeable membrane. 2. Solvents move from regions of high solute concentration to regions of lower solute concentration. ,,/3. Osmotic pressure is a colligative property. furt?yhor --===*- -.-\ <=_ ll. 9. 10. t2. 13. a. 1 only b. 2 only o. 3 only @ 1and3 e. 1,2, and3 AtZsoc,what is the osmotic pressure of a homogeneous solution consisting of l8'0 g urea (CONrH4) diluted with water to 3.00 L? (R: 0,0821 L'atm/mol'K) a. 0.205 atm 6 2.44 atm c. 7.33 atm d. 12.3 atm e. 14.7 atm Which of the following electrolytes is likely to have a v3nlpff factor equal tq.t Y Nur-Poo c. KCI d. answers a and b e. answers a, b, and c fvr6)tl < 0n6\effMt
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