Complex ions, ligands and their charge

What is the charge on this complex ion of chromium(III), $\ce{[Cr(H2O)4Cl2]^{x}}$? A. 1+ B. 3+ C. 5+ D. 1-

The cyanide ion acts as a ligand in many complex ions, for example hexacyanoferrate(III), $\ce{[Fe(CN)6]^3-}$. (i) State the type of bond, as precisely as possible, that joins each cyanide ion to the iron ion. (ii) Deduce the oxidation state of iron in…

Which statements are correct for the complex ion $\ce{[CoCl4]^2-}$? I. The oxidation state of cobalt is +4. II. The chloride ions act as Lewis bases. III. The coordination number of cobalt is 4. A. I and II only B. I and III only C. II and III only D. I, II…

What is the oxidation state of chromium in the complex $\ce{[Cr(NH3)4Cl2]Cl}$? A. +1 B. +2 C. +3 D. +7

Chloride ions can act as ligands towards transition metal ions. Three compounds of chromium that differ in the number of chloride ions bonded directly to the chromium ion have the formulas and colours shown. Compound Colour $\ce{[Cr(H2O)6]Cl3}$ violet…

Which term cannot describe the chloride ion, $\ce{Cl-}$? A. Lewis base B. ligand C. Brønsted–Lowry acid D. nucleophile