Student Name BLAhE METE Date bl2ois Instructor honells RELATED QUESTIONS All of
ID: 1006824 • Letter: S
Question
Student Name BLAhE METE Date bl2ois Instructor honells RELATED QUESTIONS All of the following questions should be answered by referring to the flow charts and your notes from the preceding experiments. 1. Demonstrate your understanding of the procedures by preparing abbreviated flow charts which would allow you to separate the following ions. For this flow chart do not include quantities of reagents used or confirmatory tests. Be sure to include necessary reagents, but only include the necessary steps for the separation. Omit unnecessary steps 109Explanation / Answer
Separation of cations
(a) Fe3+, Hg2^2+, K+
Add 2 M HCl to the mixture. Hg2^2+ precipitates out as white solid of chloride. Filter out the precipitate
Remained Fe3+ and K+ in solution.
Add NH4Cl and NH3 to the remaining solution. A brown ppt of Fe(OH)3 is formed, which is separated by filtration.
Left in solution is now only K+
(b) Pb2+, Al3+, Ag+
Add 2 M HCl. Ag+ precipitates out as white AgCl. Filter the solid out.
Add H2S gas to the remaining solution. A black precipitate of PbS is formed, which is filtered out.
Left is Al3+ is solution.
(c) Zn2+, Ca2+, Fe3+
Add NH4Cl and NH3 to the mixture solution. Brown precipitate of Fe(OH)3 is formed. Filter out the ppt.
Add H2S gas to the remaining solution. White precipitate of Zn2+ is formed. Filter out the precipitate.
Remained is Ca2+ in solution. Add (NH4)2CO3 to the remaining solution. White ppt of Ca2+ is formed.