Solved: A transition metal compound contains a cobalt ion,
Chapter , Problem 62(choose chapter or problem)
A transition metal compound contains a cobalt ion, chloride ions, and water molecules. The H2O molecules are the ligands in the complex ion and the ions are the counterions. A 0.256-g sample of the compound was dissolved in water, and excess silver nitrate was added. The silver chloride was filtered, dried, and weighed, and it had a mass of 0.308 g. A second sample of 0.416 g of the compound was dissolved in water, and an excess of sodium hydroxide was added. The hydroxide salt was filtered and heated in a flame, forming cobalt(III) oxide. The mass of cobalt(III) oxide formed was 0.145 g. What is the oxidation state of cobalt in the complex ion and what is the formula of the compound?
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