Transcript Document

Topic 9.1
Solutions
Net Ionic Equations
AgNO3 (aq) + NaCl(aq)
AgCl(s) + NaNO3(aq)
What happens when you put
AgNO3 and NaCl in water?
AgNO3
NaCl
AgNO3
NaCl
AgNO3
NaCl
AgNO3
NaCl
AgNO3
NaCl
AgNO3
NaCl
AgNO3
NaCl
Ag NO3
Na Cl
Ag+ NO3-
Na+ Cl-
Ag+ NO3-
Na+ Cl-
Ag+ NO3-
Na+
Cl-
Ag+
NO3-
Na+
Cl-
Ag+
NO3-
Na+
Cl-
NO3Ag+
Na+
Cl-
NO3Ag+
Na+
Cl-
NO3Ag+
Na+
Cl-
NO3-
Na+
Ag+
Cl-
Na+
NO3Ag+
Cl-
Na+
NO3Ag+
Cl-
Na+
NO3Ag+ Cl-
Na+
NO3Ag+ Cl-
NO3-
Na+
AgCl
Na+
NO3-
AgCl
Na+
NO3AgCl
Na+
NO3-
AgCl
AgCl(s)
precipitate
Precipitate: a solid formed in a chemical
reaction by decreased solubility
Na+
NO3-
AgCl
AgCl(s)
precipitate
NaClAgNO
3
NaCl
NaCl AgNO3
AgNO
3
NaCl AgNO
NaCl NaCl
3 AgNO
AgNO3 AgNO
3NaCl
3
NaClAgNO
3
NaCl
NaCl AgNO3
AgNO
3
NaCl AgNO
NaCl NaCl
3 AgNO
AgNO3 AgNO
3NaCl
3
NaClAgNO
3
NaCl
NaCl AgNO3
AgNO
3
NaCl AgNO
NaCl NaCl
3 AgNO
AgNO3 AgNO
3NaCl
3
NaClAgNO
3
AgNO3
NaCl
NaCl
3
NaCl AgNO
NaCl NaCl
AgNO
3 AgNO
AgNO3 AgNO
3 Na+3NaCl+
Ag NO3
Cl
NaClAgNO
3
AgNO3
NaCl
NaCl
NaCl AgNO3
Na+ +ClAg+ NO3Ag
Cl
NO
+
+
3
Na
Na
Ag+ NO3ClAgCl
+
+
Na
Ag
Cl
NO
+
+
3
Na Ag
Cl
Cl
NO+3- NO
+
- +
Ag
+NO3
3Na Na
Cl- Ag
NO3 Cl- +
NO3 Cl
Na Ag+
+
+
Na
Ag Cl+
Cl
Ag
+
Cl Ag
Ag+
AgClAgClAgCl
Ag+ NO+3- Ag+ + NO- Na + Cl 3
Ag
+
NaAg
NO3NO
Cl +
+NO+
Na
3
3
NaCl- +Na
Cl- +
+
Ag NO
- Ag
Na
Cl
+
NO3 3 Na
Na
+ Na+
Cl- Ag+
ClNO3-
AgCl
AgCl
AgClAgCl
Ag+
NO3- Na+ NO 3
+
+
Na
NO3
Ag
NO3Na+ NO+3 Cl- Na+
Na
+
+
Cl Ag NO - Ag +
Cl
3
+
Na
+
Na
Na
+
NO3Na
ClNO3-
NO3-
+ NO Na
3
+
Na
NO3 NO3
NO3Na
+ NO+3
+
Na
Na
Cl- Ag+NO - Ag+ +
Cl
3
+
Na
+
Na
Na
+
NO3Na
NO3-
+ NO Na
3
+
Na
NO3 NO3
NO3Na
+ NO+3
+
Na
Na
Cl- Ag+NO - Ag+ +
Cl
3
+
Na
+
Na
Na
+
NO3Na
NO3-
+
+ NO +
Na
Na
3
NO3- NO - - Na
3NO3 Na+
+
Na
+
Na
NO
3
NO
+
3
Na
NO3Na+ Na+
NO
3
NO
+
+
3
NO3
Na Na
-NO - Na+
Na+
NO
3
3
Na+
+
Na
NO
+
3
NO3 Na+ Na
NO3
Na+
AgCl(s)
NO3-
+
+ NO +
Na
Na
3
NO3- NO - - Na
3NO3 Na+
+
Na
+
Na
NO
3
NO
+
3
Na
NO3Na+ Na+
AgCl(s)
NO
3
NO
+
+
3
NO3
Na Na
Na+
NO3-NO3- Na+
+
Na+
Na
NO
+
3
NO
Na
+
3
NO3
Na
Na+
AgCl(s)
AgNO3 (aq) + NaCl(aq)
AgCl(s) + NaNO3(aq)
Total ionic equation
Total Ionic Equation: a chemical equation that
shows all high-solubility ionic compounds in their
dissociated form
AgNO3
NaCl
Ag NO3
Na Cl
Ag+ NO3-
Na+ Cl-
Ag+ NO3-
Na+ Cl-
Ag+ NO3-
Na+
Cl-
Ag+
NO3-
Na+
Cl-
Ag+
NO3-
Na+
Cl-
NO3Ag+
Na+
Cl-
NO3Ag+
Na+
Cl-
NO3Ag+
Na+
Cl-
NO3-
Na+
Ag+
Cl-
Na+
NO3Ag+
Cl-
Na+
NO3Ag+
Cl-
Na+
NO3Ag+ Cl-
NO3-
Na+
Ag+ Cl-
Reaction
NO3-
Na+
AgCl
Reaction
NO3AgCl
Na+
No Reaction
+
Na
NO3
AgCl
No Reaction
NO3AgCl
Na+
No Reaction
NO3- Na+
AgCl
NO3-
AgCl
Na+
NO3-
AgCl
Na+
NO3-
AgCl
Na+
NO3-
AgCl
Na+
NO3-
AgCl
Na+
These ions do not participate
in the reaction. They are called
SPECTATOR IONS
NO3-
AgCl
Na+
Spectator: an entity such as an ion,
molecule, or ionic solid that does not
change or take part in a chemical
reaction
Ag+
Cl-
Ag+
Cl-
Ag+
Cl-
Ag+
Cl-
Ag+
Cl-
Ag+
Cl-
Ag+ Cl-
Ag+ Cl-
AgCl
AgCl
AgCl
AgCl
AgCl
AgCl
AgCl
The net ionic equation is constructed from the total ionic equation:
Net Ionic Equation: a way of
representing a reaction by writing only
those ions specifically involved in an
overall chemical reaction.
Ions involved in the reaction forming the
precipitate
Spectator ions
Spectator ions
We cancel out any spectator ions
in the total ionic equations
No3- and Na+ are not participating in the reaction
net ionic equation
Ag+ (aq) + Cl- ( aq)
net ionic equation
Summary
Writing Net Ionic Equations
1. Write a balanced chemical equation
2. Using solubility information rewrite the formulas for
all high-solubility ionic compounds as dissociated
ions to show total net ionic equation
3. Cancel out spectator ions
4. Write the net ionic equation