Qualitative Cation Tests Essay Example for Free

Qualitative Cation Tests EssayLab key out garterThis document is not 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 data 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 can be sent to an instructor.ObservationsQuestionsA. Write net ionic equations for all reactions that produce a precipitate. 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)Fe3+ ( 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. signalise the cations that precipitate with hydrochloric acid and disassemble in the battlefront of ammonia.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 adjunct of cardinal or ternary drops of sodium hydroxide but redissolve upon addition of excess sodium hydroxide.Pb2+,Zn2+E. Identify the cations that precipitate upon addition of dickens or three drops of sodium hydroxide and are not touch 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 cations that pr ecipitate 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 regretful ppt, which is soluble in the excess reagent but produces dark blue solution.