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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Two different coordination compounds containing one cobalt(III) ion, five ammonia molecules, one bromide ion, and one sulfate ion exist. The dark violet form (A) gives a precipitate upon addition of aqueous BaCl2. No reaction is seen upon addition of aqueous BaCl2 to the violet-red form (B). Suggest structures for these two compounds, and write a chemical equation for the reaction of (A) with aqueous BaCl2.

Interpretation Introduction

Interpretation: The structures of compounds and the equation for the reaction between compound A with BaCl2 has to be determined.

Concept introduction:

Spectrochemical series:  A list of ligands ordered in the basis of ligand strength.

I-<Br-<Cl-<F-< OH-< H2O < NH3< en <CN-<CO

Paramagnetic property: The presence of unpaired electrons in the electronic configuration of the metal ion in coordination complex.

Diamagnetic property: The absence of unpaired electrons of the metal ion in coordination compound which do repel by the magnet.

Explanation

The compound [Co(NH3)5Br]SO4 is a dark violet solution which gives a precipitate upon the addition of aqueous BaCl2 by forming BaSO4.

The compound [Co(NH3)5(SO4)]Br is a violet-red solution has no reaction proceed upon addition of aqueous BaCl2.

Therefore,

Compound A is [Co(NH3)5Br]SO4

Compound B is [Co(N

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