electrolytes.notebook
March 10, 2017
Mar 17­10:59 AM
Mar 17­11:01 AM
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electrolytes.notebook
March 10, 2017
RULES FOR CLASSIFYING ELECTROLYTES:
1.
Acids
See Data Booklet p 8 Strong acids are strong electrolytes. Weak acids are weak electrolytes.
HF
HNO3
Oct 8­6:31 PM
RULES FOR CLASSIFYING ELECTROLYTES:
2. Bases
Hydroxides from group I and II are strong except beryllium. All others are weak.
NaOH
Zn(OH)2
Oct 8­6:31 PM
2
electrolytes.notebook
March 10, 2017
RULES FOR CLASSIFYING ELECTROLYTES:
3. Salts
Salts are written in ionic form if soluble, and in molecular form if insoluble.
Use the solubility table (Data Booklet p.10) to determine solubility.
MgBr2
BaCO3
Oct 8­6:31 PM
Example:
Classify as a strong, weak or nonelectrolyte and write the equation for the compound in aqueous solution.
a) Na3PO4
b) C6H12O6
c) HCl(aq)
Oct 8­6:32 PM
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electrolytes.notebook
March 10, 2017
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 (molecular!!!)
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) Cu(NO3)2→ Cu2+(aq) +2NO3‐(aq)
strong electrolyte
g) CdCO3 (s) → CdCO3 (s)
non‐electrolyte
h) H3PO4 (aq) → H+(aq) + H2PO4‐(aq)
weak electrolyte
Oct 8­6:40 PM
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