Analytical ChemistryHard
Question
Select the correct statement with respect to Ca2+ ions.
Options
A.K2CrO4 gives white precipitate in the presence of acetic acid.
B.Potassium hexacyanidoferrate (II) solution gives white precipitate.
C.It gives lilac colour in Bunsen flame.
D.Prolonged passage of carbon dioxide gas through its aqueous solution produces white precipitate.
Solution
(A) No precipitate with K2CrO4 in acetic acid as its ksp is high.
(B) Ca2+ + 2K+ + [Fe(CN)6]4- → K2Ca[Fe(CN)6]↓ (white)
(C) It imparts brick red colour to Bunsen flame.
(D) Ca(HCO3)2 is formed which is water soluble.
(B) Ca2+ + 2K+ + [Fe(CN)6]4- → K2Ca[Fe(CN)6]↓ (white)
(C) It imparts brick red colour to Bunsen flame.
(D) Ca(HCO3)2 is formed which is water soluble.
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