re-lab Assignment: Analysis of Group II Cations (Snt, Cd2, Cu2, BP) : Date: ote: The completed...
Faxde Nood.a Name yune 2e, 209 : Date: Pre-lab Assignment: Anelysis of Group I1 Cations (Sn, Cd, Cu, B) Ate: The completed flow chart and the answers to the questions must be handed in to your lab instructor at the beginning of next week's lab period 1 (20 pts) Complete the flow chart below (note: ppt precipitate; Soln. solution) Sa, Cd, Cu, B pH-0.5, s pPt (color) 3M KOH ppt (color) Soln (color) 6M HC 6M HCL S oolr) ppt...
43 Group II Cations Scheme Biº. Cu?, Sb 15 M NHOHNH, (Step 2) 0.3 M HCI (Step 3) 1M CHCSNH (Step 4)/Centrifuge (Step 5) Discard solution after testing for completeness of precipitation "For the General Unknown only use the solution to test for Group Ications. BiSs. Cus, Sb S. SnS (Black Solid, Step 6) 1 1MNH.CI (Step 6) GM KOH, IM CHCSNH (Step 7) Centrifuge (Step B) Bi S. Cus (Solid, Step 9) Sb(OH). ( SOH). (Solution, Step 9) 6M...
Why wouldnt a weak base, such as NH3, work just as well as KOH in (1)? 2.2 Is the question I have. I figured out 2.1 already. Below is relevant info. Thanks! 2. (1) Describe how adding a solution of KOH to the original sulfide precipitate results in the separa- tion of Sn4+ ion from the other Group W cations. (2) Why wouldn't a weak base, such as aque- ous NH3, work just as well as aqueous KOH in (1)?...