When potassium iodide is added to an aqueous solution of potassium ferricyanide, a reversible reaction is observed in which a complex P is formed. In a strong acidic medium, the equilibrium shifts completely towards P. Addition of zinc chloride to P in a slightly acidic medium results in a sparingly soluble complex Q.
The number of zinc ions present in the molecular formula of is ____.
The number of zinc ions present in the molecular formula of is ____.
Answer: 3
Solution
Complex P is (potassium ferrocyanide).
When zinc chloride is added to P in slightly acidic medium, it forms a sparingly soluble complex Q.
The reaction is:
This is potassium zinc ferrocyanide, which contains 3 zinc ions per formula unit.
Alternatively, the simpler form contains 2 zinc ions.
The source answer accepts both 3 and 2, but the more common form is with 3 zinc ions.
When zinc chloride is added to P in slightly acidic medium, it forms a sparingly soluble complex Q.
The reaction is:
This is potassium zinc ferrocyanide, which contains 3 zinc ions per formula unit.
Alternatively, the simpler form contains 2 zinc ions.
The source answer accepts both 3 and 2, but the more common form is with 3 zinc ions.
JEE Advanced · 2024 · 26 May 2024 · Paper 2 · Numerical answer