Give the group number where the cation belongs1. Mercurous(Hg2+) ion gives a white precipitate with 0.1 MHGI.2. Bismuth (Bi3-) ion does not give a precipitate with HCI but gives a blackprecipitate with thioacetamide in the presence of HCI.3. Ammonium (NHe*) ion does not give precipitate with any precipitatingagent.4. Magnesium (Mg2+) ion does not give a precipitate with HCI orthioacetamide but give a white solid product with Na2COa.5. Cobalt (Co2+) ion does not give a solid product with HCI andthioacetamide unless the solution is treated with excess NH4OH. Group I (Ag+, Pb2+, Hg2+) cations produce insoluble chlorides so they can beprecipitated with dilute HCI, while all other cations remain in solution.Group II (Cu2+, Bi3+, Cd2+, Hg2+, As3+, Sb3+, Sn4+) cations produce very insolublesulfides (Ksp values less than 10-30) so they can be precipitated by low amounts ofsulfide ion; this can be achieved by adding an acidic solution of H2S.Group III (A13+, Cr3+, Fe3+, Zn2+, Ni2+, Co2+, Mn2+) cations produce slightly solublesulfides (Ksp values more than 10-20) so they can be precipitated by relatively highamounts of sulfide ion; this can be achieved by adding a basic solution of H2S.Group IV (Mg2+, Ca2+, Sr2+, Ba2+) cations, as well as all of the above groups,produce insoluble carbonates so they can be precipitated by the addition of carbonateonce the ions of the first three groups have been removed.Group V (Na+, K+, NH4 +) cations do not precipitate with any of the above reagents.Moreover, you can supplement your knowledge on this by reading or researching aboutsolubility rules.

Answered: Image /qna-images/answer/5f3bc641-f5d1-4bc0-b0a9-e01d5413863d.jpg

Give the group number where the cation belongs 1. Mercurous(Hg2-) ion gives a white precipitate with 0.1 MHCI- 2. Bismuth (Bi3-) ion does not give a precipitate with HCI but gives a black precipitate with thioacetamide in the presence of HCI. 3. Ammonium (NH4*) ion does not give precipitate with any precipitating agent. 4. Magnesium (Mg²+) ion does not give a precipitate with HCI or thioacetamide but give a white solid product with NazCOa. 5. Cobalt (Co2+) ion does not give a solid product with HCl and thioacetamide unless the solution is treated with excess NH4OH.

Give the group number where the cation belongs 1. Mercurous(Hg2-) ion gives a white precipitate with 0.1 MHCI- 2. Bismuth (Bi3-) ion does not give a precipitate with HCI but gives a black precipitate with thioacetamide in the presence of HCI. 3. Ammonium (NH4*) ion does not give precipitate with any precipitating agent. 4. Magnesium (Mg²+) ion does not give a precipitate with HCI or thioacetamide but give a white solid product with NazCOa. 5. Cobalt (Co2+) ion does not give a solid product with HCl and thioacetamide unless the solution is treated with excess NH4OH.

Chemistry by OpenStax (2015-05-04)

1st Edition

ISBN:9781938168390

Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Chapter15: Equilibria Of Other Reaction Classes

Section: Chapter Questions

Problem 11E: The Handbook of Chemistry and Physics (http://openstaxcollege.org/l/16Handbook) gives solubilities...

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