Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0132525763
ISBN 13: 978-0-13252-576-3

Chapter 9 - Chemical Names and Formulas - 9 Assessment: 109

Answer

In this case we can take advantage of either of three properties displayed by the compounds mentioned: density, solubility in water, and melting point. If we decide to proceed with the first, we can produce a liquid with a desired density, such that the lighter compound floats and the heavier compound sinks, and pour the mixture. The second property would allow us to pour the substance in water; the ammonium chloride would dissolve, while most of the barium sulfate would not. This approach is not as desirable because the separation will not be exact, some of the barium sulfate will dissolve. Lastly, we could heat the mixture. The ammonium chloride would melt, and even vaporize, fairly quickly, while the barium sulfate will remain solid.

Work Step by Step

In this case we can take advantage of either of three properties displayed by the compounds mentioned: density, solubility in water, and melting point. If we decide to proceed with the first, we can produce a liquid with a desired density, such that the lighter compound floats and the heavier compound sinks, and pour the mixture. The second property would allow us to pour the substance in water; the ammonium chloride would dissolve, while most of the barium sulfate would not. This approach is not as desirable because the separation will not be exact, some of the barium sulfate will dissolve. Lastly, we could heat the mixture. The ammonium chloride would melt, and even vaporize, fairly quickly, while the barium sulfate will remain solid.
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