1. Tardigrade
  2. Question
  3. Chemistry
  4. An aqueous solution of CoCl2 on addition of excess of concentrated HCl turns blue due to formation of

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. An aqueous solution of $CoCl_2$ on addition of excess of concentrated $HCl$ turns blue due to formation of

AIIMSAIIMS 2005Coordination Compounds

Solution:

$CoCl _{2}$ is weak Lewis. It reacts with chloride ion to produce salt containing the tetrahedral $\left[ CoCl _{4}\right]^{2-}$ ion which is blue in colour. The oxidation state of $CO$ is $+2$.