An aqueous pink solution of cobalt(II) chloride

Question:

An aqueous pink solution of cobalt(II) chloride changes to deep blue on the addition of an excess of HCl. This is because____________.

(i) [Co(H2O)6]2+ is transformed into [CoCl6]4–

(ii) [Co(H2O)6]2+ is transformed into [CoCl4]2–

(iii) tetrahedral complexes have smaller crystal field splitting than octahedral complexes.

(iv) tetrahedral complexes have larger crystal field splitting than octahedral complex.

Solution:

Option (ii)  [Co(H2O)6]2+ is transformed into [CoCl4]2– and (iii)  tetrahedral complexes have smaller crystal field splitting than octahedral complexes. are the answers.

Leave a comment

None
Free Study Material