In 1937, R. Schwartz and M. Schmiesser prepared a yellow-orange bromine oxide (BrO 2 ) by treating

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In 1937, R. Schwartz and M. Schmiesser prepared a yellow-orange bromine oxide (BrO2) by treating Br2 with ozone in a fluorocarbon solvent. Many years later, J. Pascal found that, on heating, this oxide decomposed to two other oxides, a less volatile golden yellow oxide (A) and a more volatile deep brown oxide (B). Oxide B was later identified as Br2O. To determine the formula for oxide A, a sample was treated with sodium iodide. The reaction liberated iodine, which was titrated to an equivalence point with 17.7 mL of 0.065 M sodium thiosulfate.1(aq) + 2 SO3-(aq) 2 1-(aq) + SO (aq)

Compound A was also treated with AgNO3, and 14.4 mL of 0.020 M AgNO3 was required to completely precipitate the bromine from the sample.
(a) What is the formula of the unknown bromine oxide A?
(b) Draw Lewis structures for A and Br2O. Speculate on their molecular geometry.

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Chemistry And Chemical Reactivity

ISBN: 9780357001172

10th Edition

Authors: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

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