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Unformatted text preview: Scheme of Analysis- Assignment 2 Fair Game ions= Na + , NH 4 + , K + , OH- , Cl- , NO 3- , SO 4 2- , HSO 4- Description of Samples: Sample 1: color: Sample 2: color: odor: odor: crystal structure: crystal structure: Na + and K + Flame Test Pour a few milliliters of 15 M HNO 3 in a test tube, then place wire in test tube with corkscrew secured on top. Shake to clean wire. Rinse off acid with deionized water. Orange color (Long-lasting)= Na + exists ( K + and NH 4 + could still be present) Purple color= K + exists ( NH 4 + could still be present) * Na + is not present* No color= NH 4 + is possibly present * Na + and K + are not present* Sample 1: Sample 2: NH 4 + Volatility Solid in crucible over Bunsen burner (white smoke)= NH 4 + exists Smell of NH 3 may be produced Also, add 1 M NaOH to the solid and suspend red litmus paper above. Turns blue= NH 4 + K + precipitation testing will require that all NH 4 + be removed if present (burned) Sample 1: Sample 2: pH Test...
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- Spring '08