ions in aqueous solutions
DESCRIPTION
NO 3 1–. NO 3 1–. NO 3 1–. NO 3 1–. Pb 2+. Pb 2+. Na 1+. Na 1+. I 1–. I 1–. Ions in Aqueous Solutions. Dissociation :. Molecular Equation. Pb(NO 3 ) 2 (s). + H 2 O(aq). Pb(NO 3 ) 2 (aq). Pb 2+ (aq) + 2 NO 3 1– (aq). add water. Ions in solution. NaI(s). + H 2 O(aq). - PowerPoint PPT PresentationTRANSCRIPT
Pb2+NO3
1–
Na1+ I1–
Ions in Aqueous Solutions
Pb(NO3)2(s) Pb(NO3)2(aq)
Pb2+(aq) + 2 NO31–(aq)
addwater
NaI(s)
+ H2O(aq)
Dissociation:
+ H2O(aq)
Na1+(aq) + I1–(aq)
Mix them and get…
NaI(aq)
NO31–
Pb2+
NO31–
NO31–
Ions in solution
Na1+ I1– Ions in solution
addwater
Molecular Equation
Molecular Equation
Mix them together and get…
Pb2+(aq) + 2 NO31–(aq) + 2 Na1+(aq) + 2 I1–(aq) PbI2(s) + 2 NO3
1–(aq) + 2 Na1+(aq)
Pb2+(aq) + 2 I1–(aq) PbI2(s)
Pb(NO3)2(aq) + 2 NaI(aq) PbI2(s) + 2 NO31–(aq) + 2 Na1+(aq)
Balance to get overall ionic equation…
Cancel spectator ions to get net ionic equation…
solid
in solution
Pb2+NO3
1–
Na1+ I1–
NO31–
Na1+ I1–
Pb2+
NO31–
Na1+
I1–
NO31–
Na1+
I1–
Ba2+
OH1–
OH1–
NO31–
NO31–
Mix together Zn(NO3)2(aq) and Ba(OH)2(aq):
Zn2+(aq) + 2 NO31–(aq) Ba2+(aq) + 2 OH1–(aq)
Ba(OH)2(aq)Zn(NO3)2(aq)
Balance to get overall ionic equation…
Zn2+
Zn(NO3)2(aq) + Ba(OH)2(aq) Zn(OH)2(s) + 2 NO31–(aq) + Ba2+(aq)
Zn2+(aq) + 2 NO31–(aq) + Ba2+(aq) + 2OH1–(aq) Zn(OH)2(s) + 2 NO3
1–(aq) + Ba2+(aq)
Mix them and get…
Zn2+(aq) + 2 OH1–(aq) Zn(OH)2(s)
Cancel spectator ions to get net ionic equation…
Acid-Base (Neutralization): an acid and base form salts and water.
ie. HClHCl(aq)(aq) + NaOH + NaOH(aq)(aq) NaCl NaCl(aq)(aq) + H + H22OO
Gas Evolution: reaction where a gas is formed.ie. HH22SOSO44(aq)(aq) + Li + Li22SS(aq)(aq) H H22SS(g)(g) + Li + Li22SOSO44(aq)(aq)
Precipitation: a precipitate is formed from two soluble substances.
ie. 2KI2KI(aq)(aq) + Pb(NO + Pb(NO33))22(aq)(aq) PbI PbI22(s)(s) + 2KNO + 2KNO33(aq)(aq)
Redox Reactions: How They Work
1. 2Mg (s) + O2 (g) → 2MgO (s)
Each Mg loses 2 e-; Each O gains 2 e-
2. Ca (s) + Cl2 (g) → CaCl2 (s)
Ca loses 2 e-; Each Cl gains 1 e-
3. Zn (s) + Fe2+ (aq) → Zn2+ (aq) + Fe (s) Zn loses 2 e-; Fe gains 2 e-