Following are the transition metal ions of 3d series : Ti4+, V2+, Mn3+, Cr3+

Q.  Following are the transition metal ions of 3d series :

Ti4+, V2+, Mn3+, Cr3+

(Atomic numbers : Ti = 22, V = 23, Mn = 25, Cr = 24)

Answer the following :

(a) Which ion is most stable in aqueous solution and why?

(b) Which ion is strong oxidising agent and why?

(c) Which ion is colourless and why?

Ans. (a) Ti4+ has highest oxidation state among the given

ions. Ti4+ has stable inert gas configuration and hence,

most stable in aqueous solution.

On the other hand, V2+, Mn3+, Cr3+ have unstable

electronic configuration and hence, are less stable.

(b) Due to presence of highest oxidation state of Ti, it

acts as the strongest oxidising agent among the given

ions.

(c) Due to absence of unpaired electron in Ti4+, it is a

colourless ion.

E.C. of Ti4+ : [Ar]3d04s0