Chemistry - Coordination Chemistry Question with Solution | TestHub
ChemistryCoordination ChemistryIsomerismHard2 minQB
ChemistryHardinteger
The scheme shows four cobalt species in sequence. C0 is [Co(NH₃)₆]Br₂. C1 is formed from C0 by oxidation with H₂O₂ in H₂SO₄. C2 is an ionisation isomer of C1 obtained by anion exchange. Let X be the molar mass of the species formed in the step where the oxidation number of cobalt changes, and Y the molar mass of the complex whose ionisation isomer also appears in the scheme. Find X + Y. (Co = 59, Br = 80, S = 32, O = 16; NH₃ = 17.)
Answer:
640
Solution:
C0 is Co(II). C1 is [Co(NH₃)₅(SO₄)]Br, Co(III), so the oxidation step forms C1: M = 59 + 85 + 96 + 80 = 320, so X = 320. C2 is [Co(NH₃)₅Br]SO₄, which is an ionisation isomer of C1; it has the same formula mass 320, so Y = 320 whichever of the pair is taken. X + Y = 640.
Stream:JEESubject:ChemistryTopic:Coordination ChemistrySubtopic:Isomerism
⏱ 2mℹ️ Source: QB
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