Which of the following is most likely the structure of CrO3.6H2O if 1/3 of the total chlorine of the compound is precipitated by adding AgNO3 to its aqueous solution:
Correct answer: C. [CrCl2(H2O)4]Cl.2H2O
- A. CrCl3.6H2O
- B. [Cr(H2O)3Cl3].(H2O)3
- C. [CrCl2(H2O)4]Cl.2H2O
- D. [CrCl(H2O)5]Cl2.H2O
Explanation
[CrCl2(H2O)4]Cl.2H2O has only one ionisable Cl out of three Cl atoms present in the compound. Two Cl atoms which are non-ionisable are present in co-ordination sphere.
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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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