White lotion Test for Sulfide ion

A) White Lotion and Sulfuric is added and produces BLACK color precipitate Product formed: Lead sulfide (Black precipitate) 2 Sodium nitroprusside (Violet / Purple color) B) If Sodium nitroprusside is added, the color changes into violet or purple Formula: S2−+Na2[Fe(CN)5NO]⟶Na2[Fe(CN)5NOS]2-