Name ______________________________________ Per ________ Date _______________________
12.1 Practice Worksheet
Part 1: Solubility
Using the general rule, “like dissolves like”
 Polar substances, such as _____________ compounds and ________________ molecules will dissolve
each other.
 Nonpolar molecules dissolve other __________________ molecules.
 Alcohols (which have characteristics of both) will dissolve in both types of solvents. But cannot
themselves dissolve ionic solids.
Put a check in the column, if the given solute will dissolve in any of these three common solvents.
Solutes
Polarity
Water
Solvents
CCl4
Alcohol
1. NaCl
2. Br2
3. ethanol
(C2H2OH)
4. KNO3
5. benzene
(organic)
6. I2
7. octane
Part 2: Electrolytes vs. Nonelectrolytes
Electrolytes are substances that break up (dissociate or ionize) in water to produce____________. These ions
are capable of conducting an electric current.


Electrolytes can be: acids, bases, and salts (ionic compounds).
Nonelectrolytes can be: covalent molecules (excluding acids) & other compounds that do not produce
ions .
Name ______________________________________ Per ________ Date _______________________
Classify the following solutions as either electrolytes or as a nonelectrolyte, by putting a check in the box.
Compound
1. NaCl
Electrolyte Nonelectrolyte Why?
2. sucrose
(C6H6O6)
3. HCl
4. NaOH
5. acetic acid
(C2H3O2)
6. methanol
(CH3OH)
7. CH2Cl2
Part 3: Conductivity & Electrolytes
Conductivity is ability of a substance to conduct electricity. Solutions containing electrolytes are not the only
substances that can conduct electricity.
What other substances can you think of conduct electricity?
Put a C on the line if the substance is conductive, or N if it is not.
1. Copper
_________
2. NaOH (aq)
_________
3. NaCl (s)
_________
4. Magnesium
_________
5. H2SO4
_________
6. Sucrose
_________
7. Sucrose (aq)
_________
8. Ca(OH)2 (aq)
_________
9. Methanol (CH3OH)
_________
10.CaBr2 (aq)
_________