Chp 2

2032-Ch09-homework
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) In water, a substance that ionizes completely in solution is called a ________.
A) weak electrolyte
B) semiconductor
C) strong electrolyte
D) nonelectrolyte
E) nonconductor
2) A solution with the same osmotic pressure as the blood is ________.
A) isotonic to the blood
B) molar to the blood
C) hypotonic to the blood
D) nontonic to the blood
E) hypertonic to the blood
3) Water is a polar solvent and hexane (C6H14) is a nonpolar solvent. Which of the following correctly describes the solubility of the solute in the given solvent?
A) CaCl2, soluble in hexane
B) octane, soluble in water
C) CCl4, soluble in water
D) mineral oil, soluble in water
E) NaHCO3, soluble in water
4) What is the concentration, mass/volume percent (m/v), of a solution prepared from 46 g
NaCl and 2.5 L of water?
A) 0.050% (m/v)
B) 5.0% (m/v)
C) 1.8% (m/v)
D) 0.020% (m/v)
E) 20.% (m/v)
5) Which of the following molecules can form hydrogen bonds?
A) CH4
B) NH3
C) BH3
D) HI
E) NaH
6) The O-H bond in water is polar because
________.
A) it is an ionic bond
B) hydrogen is much more electronegative than oxygen
C) oxygen occupies more space than hydrogen D) oxygen is much more electronegative than hydrogen
E) it is a hydrogen bond
7) In a solution, the solvent ________.
A) is a liquid.
B) is the substance present in the smallest concentration. C) is never a solid.
D) can be a liquid or gas.
E) can be a solid, liquid, or gas.
8) What is the concentration, in mass percent
(m/m), of a solution prepared from 40.0 g NaCl and 160.0 g of water?
A) 33.3% (m/m)
B) 20.0% (m/m)
C) 0.250% (m/m)
D) 40.0% (m/m)
E) 3.00% (m/m)
9) What is the new mass/volume percent (m/v) of a KOH solution that is prepared by diluting
320 mL of a 6.0% (m/v) KOH solution to 960 mL? A) 6.0% (m/v)
B) 1.0% (m/v)
C) 18% (m/v)
D) 2.0% (m/v)
E) 12%