Transcript 4-Net Ionic Equations

Sometimes when solutions are combined
insoluble precipitates are formed. Solubility
rules are used to identify precipitates and net
ionic equations are used to eliminate spectator
ions.
Lead(II) acetate is combined with sodium
bromide. Identify the precipitate and write the
net ionic equation.
Lead(II) bromide has low solubility
Pb2+(aq)
+ 2 Br1- (aq) 
PbBr2(s)
Balance the equation
Write the complete balanced equation
Pb(C2H3O2)2(aq)
+
2 NaBr(aq)
PbBr2(s)
+
2 NaC2H3O2(aq)
Ionic Equation – break all aqueous substances
into ions
Pb2+(aq) + 2C2H3O21-(aq)
+
2Na1+(aq) + 2Br1-(aq)
PbBr2(s)
+
2Na1+(aq) +
2C2H3O21-(aq)
Pb(C2H3O2)2(aq)
+
2 NaBr(aq)
PbBr2(s)
+
2 NaC2H3O2(aq)
Net Ionic Equations – Cancel all spectator ions
(ions common to both sides)
Pb2+(aq) + 2C2H3O21-(aq)
+
2Na1+(aq) + 2Br1-(aq)
PbBr2(s)
+
2Na1+(aq) +
2C2H3O21-(aq)
Pb(C2H3O2)2(aq)
+
2 NaBr(aq)
PbBr2(s)
+
2 NaC2H3O2(aq)
Net Ionic Equations – Cancel all spectator ions
(ions common to both sides)
Pb2+(aq) +
+
2Na1+(aq) + 2Br1-(aq)
PbBr2(s)
+
2Na1+(aq) +
Pb(C2H3O2)2(aq)
+
2 NaBr(aq)
PbBr2(s)
+
2 NaC2H3O2(aq)
Net Ionic Equations – Cancel all spectator ions
(ions common to both sides)
Pb2+(aq) +
+
2Br1-(aq)
PbBr2(s)
Pb(C2H3O2)2(aq)
+
2 NaBr(aq)
PbBr2(s)
+
2 NaC2H3O2(aq)
Net Ionic Equations – Cancel all spectator ions
(ions common to both sides)
Pb2+(aq) + 2Br1-(aq)
PbBr2(s)
Write
1) Balanced chemical equations
2) Ionic equations
3) Net Ionic equations for
a) ammonium phosphate and magnesium iodide
b) sodium sulfite and iron(II) phosphate
c) barium hydroxide and copper(II) chloride
d) lithium sulfate and strontium bromide
e) calcium sulfide and aluminium acetate
Write
1) Balanced chemical equations
2) Ionic equations
3) Net Ionic equations for
a) lithium carbonate and magnesium sulfide
b) strontium acetate and potassium carbonate