Analytical ChemistryHard
Question
Which of the following is/are correct for potassium ferrocyanide ?
Options
A.It gives a brown precipitate with Cu2+ ions.
B.It gives a white precipitate of mixed salt with Ca2+ ions.
C.It in excess gives a bluish white/white precipitate with Zn2+.
D.It develops a deep red colouration with Fe3+.
Solution
(A) Cu2+ + [Fe(CN)6]4- → Cu2[Fe(CN)6] ↓ (brown).
(B) Ca2+ + 2K+ + [Fe(CN)6]4- → 2K+ Ca2+[Fe(CN)6] ↓ (white).
(C) 3Zn2+ + 2K+ + 2[Fe(CN)6]4- → K2Zn3[Fe(CN)6]2 ↓ (white/bluish-white).
(D) Fe3+ + [Fe(CN)6]4- → Fe4[Fe(CN)6]3 (prussian blue).
(B) Ca2+ + 2K+ + [Fe(CN)6]4- → 2K+ Ca2+[Fe(CN)6] ↓ (white).
(C) 3Zn2+ + 2K+ + 2[Fe(CN)6]4- → K2Zn3[Fe(CN)6]2 ↓ (white/bluish-white).
(D) Fe3+ + [Fe(CN)6]4- → Fe4[Fe(CN)6]3 (prussian blue).
Create a free account to view solution
View Solution FreeMore Analytical Chemistry Questions
Which of the following is used as a ′morning after pill′...In which of the following pairs the precipitates are red and black coloured respectively and both precipitates are solub...If one strand of DNA has the sequence ATCGTATG, the sequence in the complementary strand would be :...A coloured solution of a salt gives following reactions.(i) It gives white precipitate with sodium hydroxide which becom...Select the correct statement with respect to Ca2+ ions....