Write the balanced ionic equations for the following precipitations and complex forming reactions:
a) AgNO3 solution + copper sulphate solution
b) copper sulphate solution + lead nitrate solution
c)CoCl2 solution + conc. HCl
d) Zinc chloride solution + NaOH solution, added slowly until excess
e)Ni(NO3)2 solution + NH3 solution, added slowly until excess
You need to know the solubility rules to predict the products of some reactions. Here is a simplified set of rules.
http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
The second one is
CuSO4(aq) + Pb(NO3)2(aq) ==> PbSO4(s) + Cu(NO3)2(aq)
You turn this into an ionic equation. The others are done the same way. Probably you have learned that Zn(OH)2 is amphoteric and Ni forms the ammine with NH3.
a) To write the balanced ionic equation for the precipitation reaction between AgNO3 solution and copper sulphate solution, you first need to identify the ions involved. AgNO3 dissociates into Ag+ and NO3- ions, while copper sulphate dissociates into Cu2+ and SO4^2- ions.
The balanced ionic equation is:
Ag+(aq) + 2NO3-(aq) + Cu2+(aq) + SO4^2-(aq) -> Ag2SO4(s) + 2NO3-(aq) + Cu2+(aq)
b) For the reaction between copper sulphate solution and lead nitrate solution, you need to identify the ions involved. Copper sulphate dissociates into Cu2+ and SO4^2- ions, while lead nitrate dissociates into Pb2+ and NO3- ions.
The balanced ionic equation is:
Cu2+(aq) + SO4^2-(aq) + Pb2+(aq) + 2NO3-(aq) -> CuSO4(s) + PbSO4(s) + 2NO3-(aq)
c) In the reaction between CoCl2 solution and concentrated HCl, CoCl2 dissociates into Co2+ and 2Cl- ions, while HCl dissociates into H+ and Cl- ions.
The balanced ionic equation is:
Co2+(aq) + 2Cl-(aq) + 2H+(aq) + 2Cl-(aq) -> CoCl4^2-(aq) + H2(g)
d) In the reaction between zinc chloride solution and sodium hydroxide solution (added slowly until excess), zinc chloride dissociates into Zn2+ and 2Cl- ions, while sodium hydroxide dissociates into Na+ and OH- ions.
The balanced ionic equation is:
Zn2+(aq) + 2Cl-(aq) + 2Na+(aq) + 2OH-(aq) -> Zn(OH)2(s) + 2Cl-(aq) + 2Na+(aq)
e) Lastly, for the reaction between Ni(NO3)2 solution and NH3 solution (added slowly until excess), Ni(NO3)2 dissociates into Ni2+ and 2NO3- ions, while NH3 dissociates into NH4+ and OH- ions.
The balanced ionic equation is:
Ni2+(aq) + 2NO3-(aq) + 2NH4+(aq) + 2OH-(aq) -> Ni(OH)2(s) + 2NO3-(aq) + 2NH4+(aq)