Qualitative Cation Tests Essay Example for Free

Qualitative Cation Tests EssayLab Report AssistantThis document is non meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiments questions, diagrams if needed, and info tables that should be addressed in a formal lab report. The intent is to facilitate students writing of lab reports by providing this information in an editable file which put up be sent to an instructor.ObservationsQuestionsA. Write net ionic equations for all reactions that produce a fall down. Ag+(aq.) + Cl-(aq.) - AgCl (s)2 Ag+(aq.)+ 2OH- Ag2O (s) + H2O(l)2 Ag+(aq.)+2NH3+ H2O(l) Ag2O (s)+ 2NH4+ (aq.)Pb2+(aq.)+2Cl- (aq.) - PbCl2(s)Pb2+(aq.)+2OH-(aq.) -Pb(OH)2 (s)Pb2+(aq.)+ 2NH3(aq.)+ H2O(l) Pb(OH)2 (s)+ 2NH4+ (aq.) Cu2+(aq.) +2OH-(aq.) - Cu(OH)2 (s)2Cu2+(aq.)+SO42- (aq.) +2NH3(aq.)+2 H2O(l) Cu(OH)2.CuSO4(s) +2NH4+ (aq.) Zn2+ (aq.)+ 2OH- (aq.) - Zn(OH)2 (s)Zn2+ (aq.)+2NH3(aq.)+ H2O(l) Ag2O (s)+ 2NH4+ (aq.)Fe3+ (aq.)+ 3OH- (aq.) - Fe(OH)3(s)F e3+ (aq.)+ 3NH3(aq.)+ 3H2O(l) Fe(OH)3(s)+ 3NH4+ (aq.) Pb2+(aq.)+ CrO42-(aq.) PbCrO4(s)2Cu2+(aq.)+Fe(CN)64- (aq.) Cu2Fe(CN)6 (s)Zn2+(aq.) + S2-(aq) ZnS(s) 4Fe3+(aq.)+3Fe(CN)64- (aq.) -Fe4Fe(CN)63 (s)Ca2+(aq) + ( COO)22-(aq) Ca(COO)2 (s)B. determine the cations that precipitate with hydrochloric acid and dissolve in the presence of ammonium hydroxide.Ag+C. Identify the cations that precipitate with hydrochloric acid and do not redissolve in the presence of ammonia.Pb2+D. Identify the cations that precipitate upon addition of two or ternary drops of sodium hydroxide but redissolve upon addition of overindulgence sodium hydroxide.Pb2+,Zn2+E. Identify the cations that precipitate upon addition of two or three drops of sodium hydroxide and are not affected by additional sodium hydroxide.Ag+,Cu2+,Fe3+F.Identify the cations that precipitate upon addition of two or three drops of aqueous ammonia but redissolve upon addition of excess aqueous ammonia.Ag+,Cu2+,Zn2+G. Identify the cation s that precipitate upon addition of two or three drops of aqueous ammonia and are not affected additional aqueous ammonia.Pb2+,Fe3+H. What simple test would distinguish Ag+ and Cu2+ ?Upon addition of two or three drops of aqueous ammonia, Ag+ produces brown ppt, which is soluble in the excess reagent, resulting in clear, colorless solution.Upon addition of two or three drops of aqueous ammonia, Cu2+ produces blue ppt, which is soluble in the excess reagent but produces dark blue solution.