Transcript Chemistry 100 - University of Illinois at Urbana–Champaign

Clicker #1
When aqueous silver nitrate and aqueous
sodium chromate are mixed, what are the
formulas of the products?
A)
B)
C)
D)
E)
Na2NO3 and AgCrO4
NaNO3 and Ag2CrO4
NaNO3 and AgCrO4
Na2NO3 and AgCr2O7
NaNO3 and Ag2Cr2O7
Clicker #2

When potassium
chloride and sodium
nitrate are mixed, what
precipitate will form?
KCl(aq) + NaNO3(aq) →
A)
B)
C)
D)
E)
KNO3
NaCl
KCl
NaNO3
No precipitate will
form.






Solubility Rules
Most nitrate salts are soluble.
Most salts of sodium, potassium,
and ammonium cations are
soluble.
Most chloride salts are soluble.
Exceptions: Ag+ and Pb2+.
Most sulfate salts are soluble.
Exceptions: Ca2+, Ba2+, and Pb2+.
Most hydroxide salts are only
slightly soluble. Soluble ones are:
Na+, K+, and Ca2+.
Most sulfide, carbonate, and
phosphate salts are only slightly
soluble.
Clicker #3

Will the resulting solution conduct electricity?
A) No. There is no precipitate formed and a
solid is required to conduct electricity.
B) No. The resulting solution is pure water
which does not conduct electricity.
C) Yes. The resulting solution is pure water
which conducts electricity.
D) Yes. The resulting solution contains ions
which conduct electricity.
Clicker #4

Is the resulting net ionic equation a chemical reaction?
H+(aq) + OH–(aq) → H2O(l)
A) Yes. There is a new compound formed from H+ and
OH–.
B) Yes. Whenever two compounds are mixed, a
chemical reaction always occurs.
C) No. A precipitate (solid) must be formed to be
considered a chemical reaction.
D) No. There was no color change so a chemical
reaction did not occur.