1. CaCl2 (aq) + Pb(NO3)2 (aq) a Ca+2 Cl-1 Pb+2 NO3-1 Ca (NO3)2 + PbCl2
balanced molecular equation

2. Is this soluble and a strong electrolyte?
CaCl2 (aq) + Pb(NO3)2 (aq) a Ca(NO3)2 + PbCl2
To write the ionic equation, any compound that is soluble and a strong electrolyte is ionized completely.

3. To know if something is soluble, you memorize the solubility rules.
Strong electrolytes are all salts (soluble or not), strong acids (7) and strong bases (8).
All other acids and bases are the weak electrolytes.

4. Is this soluble and a strong electrolyte?
CaCl2 (aq) + Pb(NO3)2 (aq) a Ca(NO3)2 + PbCl2
Ca+2 + 2Cl-1
+ Pb+2 + 2NO3-1
a Ca+2 + 2NO3-1
+ PbCl2
not Cl2(g) Br I N Cl H O F

5. CaCl2 (aq) + Pb(NO3)2 (aq) a Ca(NO3)2 + PbCl2
+ PbCl2(s)
(Complete) Ionic equation

6. CaCl2 (aq) + Pb(NO3)2 (aq) a Ca(NO3)2 + PbCl2
a PbCl2(s)
The net ionic equation is written simply by eliminating the spectator ions.
Net ionic equation
This reaction happens because a precipitate is formed.

7. Is this soluble and a strong electrolyte?
molecular equation 2
HC2H3O2(aq) + Ca(OH)2 (aq) a H+
C2H3O2-1
Ca+2
OH-1 2
HOH +
Ca(C2H3O2)2
ionic equation
2HC2H3O2
+ Ca OH- a
2 H2O
+ Ca+2 + 2C2H3O2-
net ionic equation
weak acid
2HC2H3O2
2 H2O
+ 2C2H3O2-
HC2H3O D H C2H3O2-
+ 2 OH- a
99% 1%
This reaction happens because a nonelectrolyte is formed.

8. Is this soluble and a strong electrolyte?2
HCl(aq) + Na2CO3(s) a
H+CO3-2
H2CO3
+ Na+Cl-
+ NaCl 2
2H Cl-
+ Na2CO3(s) a
H2O + CO2(g)
+ 2Na+ + 2Cl-
It’s a weak acid and decomposes.
2H+
+ Na2CO3(s) a
H2O + CO2(g)
+ 2Na+
It’s a solid (not even in water)
This reaction happens because a nonelectrolyte and a gas is formed.