When concentrated HCl is added to an aqueous | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The aqueous solution of $CoCl_2$ contains the octahedral complex $[Co(H_2O)_6]^{2+}$,which is reddish-pink in colour.When concentrated $HCl$ is ad

Vedclass · Accepted Answer

$[CoCl_4]^{2-}$

Vedclass · Answer

(A) The aqueous solution of $CoCl_2$ contains the octahedral complex $[Co(H_2O)_6]^{2+}$,which is reddish-pink in colour.When concentrated $HCl$ is added,the chloride ions $(Cl^-)$ act as ligands and replace the water molecules to form the tetrahedral complex $[CoCl_4]^{2-}$.The formation of the tetrahedral $[CoCl_4]^{2-}$ complex is responsible for the deep blue colour observed in the solution.Therefore,the correct complex ion is $[CoCl_4]^{2-}$.

When concentrated $HCl$ is added to an aqueous solution of $CoCl_2$,its colour changes from reddish pink to deep blue. Which complex ion gives blue colour in this reaction?

Similar Questions

Which of the following does not react with $AgCl$?

$AgCl$ precipitate dissolves in ammonia due to the formation of

$X$ is the number of electrons in $t_{2g}$ orbitals of the most stable complex ion among $[Fe(NH_3)_6]^{3+}$,$[Fe(Cl)_6]^{3-}$,$[Fe(C_2O_4)_3]^{3-}$ and $[Fe(H_2O)_6]^{3+}$. The nature of the oxide of vanadium of the type $V_2O_X$ is:

The solubility of silver bromide in hypo solution is due to the formation of

Which of the following is a spin-free complex?

Vedclass Test Series

Exam Paper Generator

Online Exam Module