unknown 1 scheme.doc

unknown 1 scheme.doc - CATION(Na NH4 K Flame test is orange...

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CATION (Na + , NH 4 + , K + ) Flame test is orange Flame test is not orange (NH 4 + , K + ) Na + does not interfere with cobaltnitrite test NH 4 + interferes with cobaltnitrite test. So, get rid of NH 4 Cl first by igniting it If acidic pH test If near neutral NH 4 + is absent NH 4 + is present K + is present K + may not be present Verify Verify Verify Ignite to remove NH 4 Cl Do Litmus test (warm or add OH - ) ~ Do cobaltnitrite test ~ If yellow ~ Do cobaltnitrite test ~ If yellow ~ For litmus, if distinct blue or purple ~ If solution has bad odor due to formation of NH 3 NH 4 + is present K + is present K + is present Na + is present Dissolve in H 2 O (water = 7.0) Get pH
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ANION Cl - , OH - , SO
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  • Spring '08
  • Horvath
  • pH

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