Question

Which of the following complex ions would you expect to have the largest overall Kf? [Co(NH3)6]3+, [Co(en)3]3+, [Co(H2O)6]3+, [Co(H2O)4(en)]3+.

Answer 1

Which of the following complex ions would you expect to have the largest overall Kf?

Kf is useing for how much water content present in material or chemical

so now the four complxes consider which will be ?

[Co(NH3)6]3+, [Co(en)3]3+, [Co(H2O)6]3+, [Co(H2O)4(en)]3+

the third having 6 water molecues, this is the answer.[Co(H2O)₆]^3+. this will have largest overall kf.

because first and second no water by its formula or structure, when comparing third having 6 H₂O molecules and fourth having 4 H₂O molecules in its structure or formula. so third is having highest H₂O molecules, this will have largest Kf.