Answered: (a) Adding KSCN (b) Adding Ag* Photas D…

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(a) Adding KSCN (b) Adding Ag* Photas D Cangage Laaming/Carles O. Wners

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

Chapter20: Organic Chemistry

Section: Chapter Questions

Problem 28E: Acetylene is a very weak acid; however, it will react with moist silver(I) oxide and form water and...

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Coordination Chemistry

It is a part of chemistry, in which the study of compounds that have central atoms surrounded by molecules or ions, known as ligand, is known as coordination chemistry.

Question

The photographs below (a) show what occurs when a solution of iron(III) nitrate is
treated with a few drops of aqueous potassium thiocyanate. The nearly colorless
iron(III) ion is converted to a red [Fe(H2O)5SCN)
2+
ion. (This is a classic test for the
presence of iron(III) ions in solution.)
[Fe(H2O)6
]
3+
(aq) + SCN
−
(aq) ⇄ [Fe(H2O)5SCN]
2+
(aq) + H2O(ℓ)
(a) As more KSCN is added to the solution, the color becomes even more red.
Explain this observation.
(b) Silver ions form a white precipitate with SCN
−
ions. What would you observe
on adding a few drops of aqueous silver nitrate to a red solution of [Fe(H2O)5 Explain your observations?

(a) Adding KSCN
(b) Adding Ag*
Photas D Cangage Laaming/Carles O. Wners

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