Analytical ChemistryHard
Question
K4[Fe(CN)6] can be used to detect one or more out of Fe2+, Fe3+, Zn2+, Cu2+, Ag+, Ca2+ :
Options
A.only Fe2+, Fe3+
B.only Fe3+,Zn2+,Cu2+
C.all but not Ca2+
D.all of these.
Solution
Fe2+ + [Fe(CN)6]4- → white precipitate ; Fe3+ + [Fe(CN)6]4- → Prussian blue precipitate.
Zn2+ + [Fe(CN)6]4- → Bluish white/white precipitate ; Cu2+ + [Fe(CN)6]4- → chocolate brown precipitate
Ag+ + [Fe(CN)6]4- → white precipitate ; Ca2+ + K4[Fe(CN)6]4- → white precipitate.
Zn2+ + [Fe(CN)6]4- → Bluish white/white precipitate ; Cu2+ + [Fe(CN)6]4- → chocolate brown precipitate
Ag+ + [Fe(CN)6]4- → white precipitate ; Ca2+ + K4[Fe(CN)6]4- → white precipitate.
Create a free account to view solution
View Solution FreeMore Analytical Chemistry Questions
Which of the following cations form(s) black precipitate(s) with H2S (g) ?...A wooden wheel of radius R is made of twosemicircular parts (see figure). The two partsare held together by a ring made ...In II B group of basic radicals, the yellow precipitate (s) is/are given by :...A solution of a salt in concentrated sulphuric acid H2SO4 acid produced a deep blue colour with starch iodide solution. ...When small amount of SnCl2 is added to a solution of Hg2+ ions, a silky while precipitate is obtained. The silky white p...