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scheme of analysis 2 - Scheme of Analysis Assignment 2...

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Scheme of Analysis - Assignment 2 Possible Ions: Cations: Na + , K + , NH 4 + Anions: Cl - , NO 3 - , SO 4 2- , HSO 4 - , OH - 1. Sample Description: Color Appearance Odor Phase 2. Flame Test: Prior to performing any flame tests, heat your nichrome wire loop with the Bunsen burner. If the wire produces a color, dip the loop in 16M HONO 2 and rinse with deionized water to remove impurities. Reheat and repeat cleansing as necessary until the wire produces no flame color. If necessary, clip off the end of the wire. Yellow Flame: Na + present Purple Flame: K + possibly present o Note: If the flame is orange, NH 4 + or K + could be present; if flame is purple, Na + is not present but NH 4 + could be Red Flame: Ca 2+ possibly present 3. Test for NH 4 + : Place some of the solid sample in 1M NaOH Hold a moist piece of red litmus paper above the sample o If litmus changes to blue, NH 4 + present. If no change occurs, carefully smell the solution to confirm or deny ion presence.
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