In most of its ionic compunds cobalt is either coii or

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In most of its ionic compunds cobalt is either Co(II) or Co(III). One such compound containing chloride ion and water of hydration, was analyzed, and the following results were obtained. A 0.256g 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 0.308g. A second sample of 0.416g of the compound was dissolved in water and an excess of sodium hydroxide was added. The hydroxide salt was filtered and heat in a flame forming cobalt(III) oxide. The mass of cobalt (III)oxide was 0.145g. A. What is the % composition by mass of the compound? B. Assuming the compound contains one cobalt ion per formula unit what is the formula? C. Write a balanced chemical for each of the three reactions described.

Reference no: EM13583455

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