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Cation Lab Manual
c) In the case of ammonium ion,
NH4+, no precipitate is formed
with aqueous sodium hydroxide. However, when the mixture
of ammonium ions and sodium hydroxide is warmed gently,
ammonia gas is liberated
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NH4+ (aq)
ion
|
|
a) Add NaOH (aq) until no
further change is observed.
b) Heat the mixture.
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| Observation |
a) Solution remained colourless.
b) Pungent, colourless gas
evolved turned moist red litmus blue. Ammonia
gas evolved.
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| Ionic equation |
NH4+
(aq) + 2OH- (aq) ---> NH3
(g) + H2O (l) |
.
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