FLAME TEST 1.Althought flame tests are usually specific for each elemnt , they c

Question

FLAME TEST

1.Althought flame tests are usually specific for each elemnt , they can be misleading.Sodium may be present in each sample therfore a cobalt glass is needed to observe the real color emitted by potassium,Why is blue glass used instead of any other colors?

2.An unknown solution tested in the experiment gave a yellow green flame test .Do you expect to observe a precipitate eith reagents used in Part C of this experiment?

3.Write electronic configuration of each metal investigated in this module oes the electron configuration of each metal predict the reaction outcome observed in chemical fingerprinting.

4.Why do different atom/ ions emit different colors of light?

Explanation / Answer

Answer 1

The colors produced by a potassium flame (pale violet) can usually be observed only with the assistance of glass that can filter out interfering colors

In flame tests, sodium ions may contaminant a sample and produce a flame of yellow masking the color of other ions.

If a piece of cobalt blue glass is used, the blue glass will absorb the yellow color, and the other substance’s flame can be seen.

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