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Qualitative test- flame tests

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Introduction

Qualitative test- flame tests Introduction For this test I had five containers labelled A-E. Each containing a metal salt. I had to find out which metal is used in each of the five unknown salts by using a metal loop placing it in the unknown salts and testing it by putting the metal under a roaring Bunsen flame Safety Points � Wear googols all the time when doing the experiment as hydrochloric acid can go in your eye. � Stand up when doing the experiment at all times as your have more time to move away from an accident. � Close the container after you have finishing using it. ...read more.

Middle

I turned the gas valves on a put a fire under the Bunsen burner so the fire can start on top of the Bunsen burner. 3)I then cleaned a metal loop under the roaring Bunsen flame to get rid of all the other substance on it. 4) I then dipped the metal loop into a beaker of hydrochloric acid. 5)I then placed it into one of the unknown salt, then places it into the roaring Bunsen burner flame, and noted the colour. 6)For each of the other five solution I repeated step two but with a different metal salt and a different metal loop for each metal salts. ...read more.

Conclusion

Evaluation The problems encountered was that the colour of the metal salt on the metal loop was all different kinds of colour from substances before the test so I had to clean it under a roaring flame which took quite a long time. The human error that could have occurred is when the metal loop is used twice on two different salts. This could results in cross-contamination which would mean I would get bad results. If I had more time I would make improvements by doing the experiment by myself because there were lots of people doing this test the same time, using the metal loops at the same time, and they may think that the metal loop they are using have not been used, then they used it and cause cross-contamination which would mean I would could get bad results. ...read more.

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