Reference no: EM13855755
1. A 0.5 M solution of NaCl would have _____ osmolarity as compared to a 0.3 M solution of Al(NO3)3
2. Consider a solution made from a nonvolatile solute and a volatile solvent. Which statement is true?
The vapor pressure of the solution is always greater than the vapor pressure of the pure solvent.
The freezing point of the solution is always higher than the freezing point of the pure solvent.
No answer text provided.
The boiling point of the solution is always higher than the boiling point of the pure solvent.
3. Pure water will have a lower boiling point than salt water. True or False
4. 15 ppm of a substance in water is equal to a concentration of 1.5 mg/mL. True/False
5. if a solute (molecular mass 55 u) in a solution has a concentration of 15% mass/volume, what is its molarity?
1.5 mol/L
15 mol/L
0.55 mol/L
0.27 mol/L
2.7 mol/L
6. 300 mL of salt solution contains 6.5 grams of NaCl (molecular mass of sodium chloride is 58.44 u). What is its molarity?
A.21.64 B.0.37 C.0.22 D.0.021 E.65
7. A 1-M solution of Na2SO4 has a concentration of 3 Eq/L. True/False
8. A 0.85% (w/v) solution contains
0.85 grams of solute per 1000 mL of solution
0.85 grams of solute per 100 grams of solution
0.85 grams of solvent per 100 mL of solute
0.85 grams of solute per 100 ml of solution
9. If 5 moles of a solute are dissolved in 750 mL of solvent, the molarity of the solution is 6.67 M. True/False
10. 2.0 x 103 mL (2000 mL) of solution was prepared by dilution of 28.0 mL of 18.0 M H2SO4. What is the concentration of the diluted solution?
11. Phospholipids have very long, nonpolar chains with a small polar head. Hence they are soluble in water. True/False
12. The solutions of which of the following solutes will conduct electricity well when dissolved?a)NaBr b)HCOOC2H5 c)CH3CH2OH d)C(CH3)4 e.HCHO
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