Let x be the number of species that follow Sidgwick's EAN rule and y the number that do not. Species: Cr(CO)₆, Mn(CO)₅, Fe(CO)₅, [Co(CN)₆]³⁻, [Ni(NH₃)₆]²⁺, [Zn(NH₃)₄]²⁺, K₂[PtCl₄]. Find x/y. Give

Question

Let x be the number of species that follow Sidgwick's EAN rule and y the number that do not. Species: Cr(CO)₆, Mn(CO)₅, Fe(CO)₅, [Co(CN)₆]³⁻, [Ni(NH₃)₆]²⁺, [Zn(NH₃)₄]²⁺, K₂[PtCl₄]. Find x/y. Give the answer to two decimal places. (Atomic numbers: Cr 24, Mn 25, Fe 26, Co 27, Ni 28, Zn 30, Pt 78)

TestHub · Accepted Answer

Cr(CO)₆ = 36, Fe(CO)₅ = 36, [Co(CN)₆]³⁻ = 24 + 12 = 36 and [Zn(NH₃)₄]²⁺ = 28 + 8 = 36, so x = 4. Mn(CO)₅ = 35, [Ni(NH₃)₆]²⁺ = 38 and [PtCl₄]²⁻ = 76 + 8 = 84 (target 86), so y = 3. x/y = 4/3 = 1.33.

Chemistry - Coordination Chemistry Question with Solution | TestHub

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