Analytical ChemistryHard
Question
Select the correct statement with respect to Fe3+ ions.
Options
A.Iron (III) ions react with H2S in acidic solution to give a black precipitate of Fe2S3.
B.Iron (III) ions react with ammonium sulphide to give the black precipitate of Fe2S3.
C.Iron (III) ions react with ammonium thiocyanate solution to produce deep red colouration.
D.All of these
Solution
(A) 2Fe3+ + H2S → 2Fe2+ + 2H+ + S↓ (white)
(B) 2Fe3+ + 3S2- → 2FeS↓ (black) + S↓
(C) Fe3+ + 3SCN- → Fe(SCN)3 deep red colouration
(B) 2Fe3+ + 3S2- → 2FeS↓ (black) + S↓
(C) Fe3+ + 3SCN- → Fe(SCN)3 deep red colouration
Create a free account to view solution
View Solution FreeMore Analytical Chemistry Questions
Which of the following reagents can be used for making the distinction between AgCl and AgI ?...A white crystalline substance dissolves in water. On passing H2S in this solution, a black precipitate is obtained. The ...When chlorine (Cl2) water in excess is added to a salt solution containing chloroform, chloroform layer turns pale yello...An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves...Potassium chromate solution is added to an aqueous solution of a metal chloride. The yellow precipitate thus obtained is...