FUINDAMENTALS OF CHEMISTRY
November 12, 2012
INSTRUCTIONS:
PRINT YOUR NAME ————> NAME
QUIZ V
_____________
.
WORK 3 OF #1 THROUGH #4 (4@ 25)
SHOW YOUR WORK FOR PARTIAL CREDIT
USE THE CORRECT NUMBER OF SIGNIFICANT FIGURES
THE LAST PAGE IS A PERIODIC TABLE
R = 0.08206 lit-atm/mol-K
R = 8.3145 J/mol-K
10-34 J-s
h = 6.626 X
c = 2.9979 X 108 m/s
Avagadro’s Number = 6.022 x 10
1
2
.
3
4
.
TOTAL(75)
.
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23
SOLUBILITY RULES
Compounds Containing the
Following Ions are mostly Soluble
Exceptions
Li+, Na+, K+, NH4+
None
NO3-, C2H3O2-
None
Cl-, Br-, I-
When any of the ions pairs with
Ag+, Hg22+, and Pb2+ the
Compound is insoluble
SO42-
When x pairs with Sr2+,
Ba2+, Pb2+, or Ca2+, the
Compound is insoluble
Compounds Containing the
Following Ions are mostly Insoluble
OH-, S2-
Exceptions
When either of these ions
Pairs with Li+, Na+, K+,
NH4+ , the compound is
soluble
When S2- pairs with Ca2+,
Sr+, or Ba2+ , the compound is
soluble
When OH- pairs with Ca2+,
Sr+, or Ba2+ , the compound is
slightly soluble
CO32-, PO43-
When either of these ions
Pairs with Li+, Na+, K+,
NH4+ , the compound is
soluble
1. How many grams of oxygen can be produced by complete reaction of 15.7 g of KO2?.
4 KO2(s) + 2CO2(g)
2 K2CO3(s) +
3 O2(g)
2. Balance the following chemical reactions
(a)
P2O5(s) +
(b)
Al2S3(s)
+
(c)
K3PO4(aq) +
(d)
MnO2(s) +
(e)
Cu2O(s)
(f)
H2(g)
HF(aq)
H2O(liq)
PF5(g)
Al(OH)3(s)
Pb(NO3) 2 (aq)
HCl(aq)
+
+
C(s)
I2(g)
+
H2O(liq)
+
H2S(g)
Pb3(PO4)2(s) + KNO3 (aq)
MnCl2(aq) +
Cu(s) +
HI(g)
H2O(liq) +
CO(g)
Cl2(g)
3. Complete and balance the following reactions. The reactions will either be a
precipitation reaction, a neutralization reaction, a gas forming reaction, or no reaction
happens. For the case of no reaction, simple write “no reaction” where the products
should be. Use the correct state designator (aq), (s), (l), or (g). You must also determine
the correct formula for the products based on charges of the ions.
(a) FeSO4(aq)
+ Pb(NO3)2(aq)
(b) NiCl2(aq)
+ Na3(PO4) (aq)
(c) K2CO3(aq)
+ HNO3(aq)
(d) H2SO4(aq)
+ HBr(aq)
(e) K2SO4(aq)
+ FeBr2(aq)
(f) Na2CO3(aq)
+ CoCl2(aq)
4. When a soution of sodium sulfide (Na2S) reacts with lead(II) nitrate, Pb(NO3)2, a
black precipitate forms. For all of the equations include the correct state designator (aq),
(s), (l), or (g).. Also do not omit charges for ions in (b) and (c)
(a) Write the balanced equation for the formation of this precipitate.
(b) Write the total ionic equation for the formation of this precipitate.
(c) Write the net ionic equation for the formation of this precipitate.
(d) Identify any spectator ions.