Analysis of the data from a titration indicates that a 0.1000-g sample of the complex contains 0.0708 g of py. Further analysis shows that 0.1000 g of the complex contains 0.0132 g of cobalt and 0.0160 g of chloride. What is the empirical formula of the complex? A) Co(py)₆(Cl) (NO₃) B) Co(py)₄(NO₃)₂ C) Co₂(py)₅(Cl)₂(NO₃)₂ D) Co₃(py)₈(Cl)₂(NO₃)₄ E) Co(py)₄Cl₂

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Quizplus · Accepted Answer

To determine the empirical formula, calculate the moles of each component in the complex. For cobalt (Co), with a molar mass of approximately 58.93 g/mol, $0.0132 \, \text{g} \div 58.93 \, \text{g/mol} = 0.000224 \, \text{mol}$. For pyridine (py), assuming a molar mass of approximately 79.10 g/mol (C5H5N), $0.0708 \, \text{g} \div 79.10 \, \text{g/mol} = 0.000895 \, \text{mol}$. For chloride (Cl), with a molar mass of approximately 35.45 g/mol, $0.0160 \, \text{g} \div 35.45 \, \text{g/mol} = 0.000451 \, \text{mol}$. The ratio of Co:py:Cl is approximately 1:4:2, leading to the empirical formula Co(py)₄Cl₂.

Analysis of the Data from a Titration Indicates That a 0.1000-G