Question

IT'S URGENT. PLEASE HELP. CLASS 12TH CHEMISTRY QUESTION​

Answer 1

Myself too twelfth grade :-)

Here's your answer

1) The white precipitate that is soluble in ammonia NH₃ is Silver Chloride, so, the Chloride ion must be free, which means that the coordination entity (Atoms inside the bracket) must not contain Chlorine

So, the correct formula of the complex is: [Co(en₂)Br)].H₂O.Cl

2) Since Fluorine is a weak field L I G A N D , there will be no pairing of electrons inside the orbitals, so, there are 6 electrons in the 3d sub-shell, leaving 4 electrons in the 3d sub-shell unpaired.

Magnetic moment is calculated using the formula √n(n+2) , where n= number of unpaired electrons.

Now, the value of n, we get the magnetic moment= √(4)(4+2) = √24

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