Section 9.3 Worksheet - practice questions PDF

Preview

Summary

practice questions...

Description

The Dissolution Process 1. Explain how the solvation process describes the dissolution of a solute in a solvent. 2. The following substances all dissolve to some extent in water. Classify each as an electrolyte or a nonelectrolyte. a. Acetone (CH3COCH3) b. Iron (III) nitrate [Fe(NO3)3] c. Elemental bromine (Br2) d. Sodium hydroxide (NaOH) 3. Describe what happens when an ionic solute like Na 2SO4 dissolves in a polar solvent. 4. Describe what happens when a molecular solute like sucrose (C12H22O11) dissolves in a polar solvent. 5. Classify each substance as an electrolyte or a nonelectrolyte. Each substance dissolves in H 2O to some extent. a. NH4NO3 b. CO2 c. NH2CONH2 d. HCl 6. Classify each substance as an electrolyte or a nonelectrolyte. Each substance dissolves in H 2O to some extent. a. CH3CH2CH2OH b. Ca(CH3CO2)2 c. I2 d. KOH 7. Will solutions of each solute conduct electricity when dissolved? a. AgNO3 b. CHCl3 c. BaCl2 d. Li2O 8. Will solutions of each solute conduct electricity when dissolved? a. CH2COCH3 b. N(CH3)3 c. CH3CO2C2H5 d. FeCl2

ANSWER KEY 1. 2. 3. 4. 5. 6. 7. 8.

Each particle of the solute is surrounded by particles of the solvent, carrying the solute from its original phase. a. nonelectrolyte b. electrolyte c. nonelectrolyte d. electrolyte Each ion of the ionic solute is surrounded by particles of solvent, carrying the ion from its associated crystal. Each sucrose molecular is surrounded by solvent molecules (attracted to each other via intermolecular forces of attraction) a. electrolyte b. nonelectrolyte c. nonelectrolyte d. electrolyte a. nonelectrolyte b. electrolyte c. nonelectrolyte d. electrolyte a. yes b. no c. yes d. yes a. no b. no c. no d. yes...