When a compound of transition element is dissolved in a solution of salt, then it produces?
Correct answer: B. complex ions
- A. simple ions
- B. complex ions
- C. Double salts
- D. strong anion
Explanation
Transition metal compounds can form complex ions in solution by coordinating with surrounding molecules or ions. These complexes involve the central transition metal ion surrounded by ligands (molecules or ions that can donate electron pairs). This coordination leads to the formation of complex ions, enhancing the stability and solubility of the compound.1.Copper sulfate in water:CuSO₄(s) + 6H₂O(l) ⇌ [Cu(H₂O)₆]²+ + SO₄²-(aq)Here, the Cu²⁺ ion forms a complex ion with six water molecules by accepting their lone pairs.2.Iron(III) chloride in water:FeCl₃(s) + 6Cl-(aq) ⇌ [FeCl₆]³-The Fe³⁺ ion accepts six Cl- ions as ligands, forming an octahedral complex ion.3.Chromium(III) nitrate in potassium cyanide solution:Cr(NO₃)₃(aq) + 6KCN(aq) ⇌ [Cr(CN)₆]³- + 3KNO₃(aq)The Cr³⁺ ion replaces nitrate ions with cyanide ions (stronger ligands) to form a hexacyanidochromate(III) complex ion.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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