Question

Why is ammonium solution added during the gravimetric analysis of Ni

Answer 1

Answer:

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Explanation:

The reaction is performed in a solution buffered by either an ammonia or citrate buffer to prevent the pH of the solution from falling below 5. If the pH does become too low the equilibrium of the above reaction favors the formation of the nickel(II) ion, causing the dissolution of Ni(DMG)2 back into the mother liquor.