Copper (II) ions gives reddish brown precipitate with potassium ferrocyanide. The formula of the pre — d and f Block Elements Chemistry Question
Question
Copper (II) ions gives reddish brown precipitate with potassium ferrocyanide. The formula of the precipitate is :
Answer: B
💡 Solution & Explanation
Step 1: Chloroplatinic acid (hexachloroplatinic acid) is formed when platinum is dissolved in aqua-regia. Step 2: Its chemical formula is H2[PtCl6], which dissociates in aqueous solution to release two protons per molecule: H2[PtCl6] -> 2H+ + [PtCl6]2-. Step 3: Since it releases two protons, chloroplatinic acid is a dibasic acid, which corresponds to option (b).
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