The ligand C_2O_4^2- (oxalato, ox^2-) is a bidentate ligand. The overall charge

Question

The ligand C_2O_4^2- (oxalato, ox^2-) is a bidentate ligand. The overall charge on the anion in the complex, potassium tris(oxalato)chromate(III), and the spin only magnetic moment of the complex will be: (A) 2+; 1.73 BM (B) 3+; 3.87 BM (C) 2-; 4.90 BM (D) 3-; 3.87 BM (E) 4+; 1.73 BM Consider the complex ammonium tetrachloridoferrate(III). Which of the following answers is correct? (A) The formula is (NH_4)[FeCl_4] and the complex anion is tetrahedral. (B) The formula is (NH_4)[FeCl_4] and the complex anion is square planar. (C) The formula is (NH_4)_2 [FeCl_4] and the complex anion is square planar. (D) The formula is [Fe(NH_3)_2Cl_4] and the complex is neutral and octahedral. (E) The formula is (NH_4)[FeCl_4] and the complex anion is octahedral.

Explanation / Answer

he ligand C2O42-       (oxalato) is bidentate ligand . the overall charge on the anion in the complex

Potassium tris(oxalao ) chromate (III) and the spin only magnetic moment of the complex

19 .option c

ox (oxalate, C2O42 ) has charge 2 per oxalate

Overall charge on complex = 2     4.90 BM------answer

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20 .option c

(NH4)2[FeCl4] --------complex anion is square planar

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