Chemistry 100
Fall 2007
Name: _______________________________
Homework 5b
Soluble? Insoluble?
1. For each ionic compound below, determine if it would be soluble (aq) or insoluble (s) in
water. Use your solubility rules and also state WHICH rule (1-5 on back) you used to make
your decision
a. NaOH ____________________________________________________
b. NaBr ____________________________________________________
c. AgNO3 ____________________________________________________
d. Pb(NO3)2 ____________________________________________________
e. PbI2 ____________________________________________________
f. AgBr ____________________________________________________
g. NaI ____________________________________________________
h. H3PO4 ____________________________________________________
i. Zn3(PO4)2 ____________________________________________________
j.
(NH4)3PO4 ____________________________________________________
k. LiOH ____________________________________________________
2. For all the species you said were soluble (aq) – write the ions that would be present in
solution – be sure to include charges on your ions!
Chemistry 100
Fall 2007
3. For the following table, write a letter in the box if a reaction occurs or NR if no reactions
occur. Use your lists of strong acids and solubility rules in deciding on reactions. Below
the table, write the letters from the table, followed by a balanced ionic equation and a net
ionic equation. One is done for you as an example.
AgCH3CO2
BaCl2
(NH4)2CO3
K3PO4
NaClO4
Hg2(NO3)2
Na2S
Pb(NO3)2
A
Li2CO3
K2SO4
A. Pb2+(aq) + 2 NO3-(aq) + 2NH4+(aq) + CO32-(aq)  PbCO3(s) + 2 NO3-(aq) + 2NH4+(aq)
Pb2+(aq) + CO32-(aq)  PbCO3(s)
Chemistry 100
Solubility of salts in water (sequential):
Polar molecules dissolve (may or may not dissociate)
ammonium salts and salts of Group I strong bases are soluble
(NH4+, Li+, Na+, K+)
acetates perchlorates and nitrates are soluble
(CH3COO-,ClO3-NO3-)
Salts of Group II strong bases are soluble
( Rb+, Ca2+, Sr2+, Ba2+),
except with (SO42- , CO32- , PO43- )
Heavy metals which are insoluble with most ions except those above are
(Ag+, Pb2+, Hg22+)
Salts of strong acids are soluble (Cl-, Br-, I-, ClO3-, ClO4-, SO42- )
Fall 2007