Experiment 9

Experiment 9 - Tanisha Billups Experiment 9 April 2, 2008 I...

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Tanisha Billups Experiment 9 April 2, 2008 Introduction to Qualitative Analysis Purpose: The purpose of this lab is to Procedure 1: Initial Observations and Tests for Sodium and Ammonium 1. Note the color of the sample 2. Record any conclusions about cations absent or present 3. Use the flame test to test for traces of sodium ion 4. Get a piece of platinum or Nichrome wire sealed in a piece of glass tubing 5. Dip the wire into 12M HCl in a small test tube to clean it 6. Heat the wire in the hottest part of the Bunsen burner 7. The sodium ion will give the flame a characteristic yellow color 8. Repeat until no color is seen when the wire is placed in the flame 9. Place 10 drops of the solution to be analyzed in a clean test tube 10.Perform the flame test on it 11.If the sample being tested is your unknown, run a flame test on distilled water and another on .2M NaCl solution 12.Compare the tests 13.Place 10 drops of the original sample in an evaporating dish/ crucible 14.Moisten a strip of red/neutral litmus paper with distilled water 15.Place the paper on the bottom of a watch glass 16.Add 10 drops of 3M NaOH to the unknown 17.Swirl the evaporating dish 18.IMMEDIATELY place the watch glass on it with the litmus paper down 19.Let stand for a few minutes 20. If the paper turns blue, there are NH + ions
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Experiment 9 - Tanisha Billups Experiment 9 April 2, 2008 I...

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