Question

up ll Cations Biº, Cd, Cu?, SnCl2 Adjust to pH 0.5 using diluted HCl or NH4OH 10 drops Thioacetamide, Heat 10 min Add 1 drop diluted NH.OH, MIX, centrifuge (no separation) Add 5 drops thioacetamide, heat 2 min Add 1 drop diluted NH OH discard BizSs, Cds, Cus, SnS Wash w/ 1 ml 0.1 M NH.CI, Mix, centrifuge, discard liquid 20 drops KOH 1 drop Thioacetamide, heat 2 min BizS, Cds, Cus Sn(OH)2 6M HCl until acidic 5 drops Thioacetamide, heat 2 min 10 drops H2O 2 drops 6M HCI, heat 2 min Bi,Sz, Cus CdCl?, HS SnSz (Yellow) 10 drops 6M HNO. Heat 5 min 6M NHOH until basic 2 drops thioacetamide heat 2 min Cds (yellow) BiP, Cu(H20). 6M NHOH to basic 10 drops NHOH Cu(NH3)4? (Blue) Bi(OH), (white)
write balanced equations for whats circled in red

Answer 1

Reaction taking flace are given below, CH₂ - - NH2 Cag.) + 2H2O H₂s (aq) + CH₃ Coo (aq.) + NHy lag.) this acetamide ces Hydrogen Selfide [s. Com)<] (09) + 2H+(q) + 2H2564.) → Sosim oht 6HD Yellow ppt 2) Cd²+69.) + 4 Nithy [cd (NH) (09.) [cd (NH3) y 1 2+ + 4H+ Ž cd²+ + U NHut Eng.) a) (69) (aq) cd 2+ + s2- ag.) (ag) → cast Yellow ppt 3) Reaction of Bigs, and Cus with HNO3 Cus (s) + 4H (99.) + 2NO₃- (aq) 2 + (aq) + S(s) + 2NO₃(g) + 2120 Biz (s) + 12H + (aq) + 6 Nož (an) - 2B: 3+ (aq) + 36(s) + 6 NO(g) + 6H₂O Reaction with NH OH Cu²+ (aq) + 4NH₃ (aq.) [Cu(NH3)4] 2 + (aa.) Deep Blue complex 4 72+ Bist (aq) + 3 Nithy (aq) + 3H20 - BiloH)3 t + 3Nty (69) (1) white ppt These are the qualitative analysis of metal ions of group-II of Ca²+, Bist G2+ and sn. Formation of ppt confirms the presence of ions.