A compound has the empirical formula CoCl₃ ∙ 5NH₃.One mole of it yields two moles of silver chloride when treated with silver nitrate.Ammonia is not removed by treatment with concentrated sulfuric acid.A reasonable formula for the compound is ________. A)[Co(NH₃)₅]Cl₃ B)CoCl₃ ∙ 5NH₃ C)[Co(NH₃)₄Cl]Cl₂ ∙ NH₃ D)[Co(NH₃)₅Cl]Cl₂ E)[Co(NH₃)₄Cl₂]Cl ∙ NH₃

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Quizplus · Accepted Answer

The empirical formula of the compound is CoCl₃ ∙ 5NH₃, which simplifies to CoCl(NH2SO3) ∙ 5H2O. When treated with silver nitrate, the compound yields two moles of silver chloride, indicating that there are two chloride ions per molecule. This rules out choices A, C, and E, which have only one chloride ion per molecule. Additionally, the fact that ammonia is not removed by treatment with concentrated sulfuric acid suggests that the compound must contain a nitrogen-containing group that is resistant to acidic hydrolysis. The only nitrogen-containing group present in the empirical formula is NH2SO3. Therefore, the best choice is option D, which has the formula [Co(NH2SO3)5Cl]Cl2 ∙ NH3.

A Compound Has the Empirical Formula CoCl3 ∙ 5NH3

A Compound Has the Empirical Formula CoCl₃ ∙ 5NH₃