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Exp. 8.6 Flame Test of Some Elements

This guide explains how to utilize flame tests to identify the elements present in various compounds. By applying small quantities of compounds to a nichrome wire and placing it in a flame, you can observe the specific color changes that indicate the presence of different elements. Key questions covered include recognition of sodium and copper in flame tests, and strategies to confirm that the yellow flame is indicative of sodium rather than chlorine. Through observing color changes, you can draw conclusions about elements in mixtures, making flame tests a valuable analytical tool in chemistry.

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Exp. 8.6 Flame Test of Some Elements

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  1. Exp. 8.6 Flame Test of Some Elements

  2. Critical question: • How can a flame test be used to identify the elements in a compound?. Procedure: Add small quantities of different compounds on the loop of a nichrome wire and hold it over a flame. Be careful to rinse wire and change beaker water between samples.

  3. Data

  4. Conclusion:

  5. Questions • How could you recognize sodium in a compound by doing such a flame test? • How could you recognize copper? • When you hold a small amount of sodium chloride in a flame, you observe that the flame is right yellow. What could you do to be sure that the color is due to sodium and not chlorine? • When you spill a few drops of soup or milk on a pale- blue gas flame when cooking, the flame changes to a mixture of colors. Yellow is the most intense color. What do you conclude about this observation?

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