electrolytes.notebook
March 09, 2016
Oct 5­10:15 AM
Mar 9­2:00 PM
1
electrolytes.notebook
March 09, 2016
Would the following substances be soluble in water?
Explain your answer.
a) iodine
b) carbon tetrachloride
c) magnesium chloride
d) methanol
Oct 5­10:35 AM
Mar 17­10:59 AM
2
electrolytes.notebook
March 09, 2016
Mar 17­11:01 AM
RULES FOR CLASSIFYING ELECTROLYTES:
1.
Acids
See Data Booklet p.14. Strong acids are strong electrolytes. Weak acids are weak electrolytes.
HF
HNO 3
2. Bases
Hydroxides from group I and II are strong except beryllium. All others are weak.
NaOH
Zn(OH)2
3. Salts
Salts are written in ionic form if soluble, and in molecular form if insoluble.
Use the solubility table (Data Booklet) to determine solubility.
MgBr2
BaCO3
Oct 8­6:31 PM
3
electrolytes.notebook
March 09, 2016
Oct 10­12:09 PM
Example:
Classify as a strong, weak or nonelectrolyte and write the equation for the compound in aqueous solution.
a) Na3 PO4
b) BaSO4
c) HCl(aq)
Oct 8­6:32 PM
4
electrolytes.notebook
March 09, 2016
PRACTICE:
Classify the following compounds as strong electrolytes, weak electrolytes, or non electrolytes and write the equation for the compound in aqueous solution.
a.
b.
c.
d.
HI
CH3OH KOH AgBr
e. HNO3
f. Cu(NO3)2
g. CdCO3
h. H3PO4
ANSWERS
a) HI(aq) → H+(aq) + I‐(aq)
strong electrolyte
b) CH3OH(aq) → CH3OH(aq)
non‐electrolyte
c) KOH(aq) → K+(aq) + OH‐(aq)
strong electrolyte
d) AgBr(s) → AgBr(s)
non‐electrolyte
e) HNO3(aq) → H+(aq) + NO3‐(aq)
strong electrolyte
f) CdCO3 (s) → CdCO3 (s)
non‐electrolyte
g) H3PO4 (aq) → H+(aq) + H2PO4‐(aq)
weak electrolyte
Oct 8­6:40 PM
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