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BLACK TRIMAX PEN
SYSTEMATIC ANALYSIS OF THE GIVEN SIMPLE INORGANIC SALT - 1
Aim: To identify the anion and cation present in the given simple salt by performing suitable tests.
BLACK TRIMAX PEN
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EXPERIMENT TRIMAX PEN
OBSERVATION INFERENCE
I) Preliminary tests
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1. Colour TRIMAX PENWhite May be (NH4)+, Pb2+, Al3+,
The colour of the given salt is noted. Zn2+, Ca2+, Sr2+, Ba2+ or Mg2+.
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2.Solubility test Soluble May be Cl-, Br-, I-, (SO4) 2- ,
A Pinch of salt is made into solution NO3 -,
with Water (PO4)3-, (C2O4)2-, CH3COO- or
ammonium carbonate.
3. Action of heat Reddish Brown Vapours; May be Nitrate (NO3)-.
A pinch of salt (dry) is strongly heated in
a dry boiling test tube. popping sound May be Lead Nitrate
Pb(NO3)2
4. Flame test No characteristic coloured flame Absence of
A pinch of salt is made into a paste with Cu2+, Ca2+, Sr2+ and Ba2+.
Conc.HCI acid in a watch glass and
introduced into the non-luminous part of
Bunsen flame using loop holder.
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5. Ash test No characteristic coloured ash Absence of
A filter paper is soaked into a Al3+, Zn2+ and Mg2+.
mixture of given salt solution and Cobalt
Nitrate solution and introduced into flame
and ignited.
6. Action of Sodium Hydroxide No characteristic changes Absence of Ammonium
To a pinch of salt, NaOH solution is (NH4)+.
added and heated.
II. Identification of Anions (Acid Radical)
EXPERIMENT OBSERVATION INFERENCE
1. Action of dilute sulphuric acid No characteristic changes Absence of Carbonate,
To 1 ml of salt solution dilute Sulphuric sulphide and Acetate.
acid is added.
2. Action of Conc. sulphuric acid Mild brown fumes May be Nitrate (NO3)-.
To 1ml of salt solution conc. Sulphuric
acid is added and heated.
3. Action of Manganese dioxide. No characteristic changes Absence of Chloride, Bromide
To 0.1 g of salt, a pinch of manganese and lodide.
dioxide and conc. Sulphuric acid are
added and heated.
4. Copper turnings test: Evolution of brown fumes Presence of Nitrate (NO3)-
A small quantity of the salt is heated .
with Copper turnings and conc. Sulphuric
acid.
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5.Ammonium Molybdate Test No Canary yellow precipitate Absence of Phosphate.
To 1 ml of salt solution conc. Nitric acid is
added and heated strongly until fume
ceases.
Then Ammonium Molybdate is added.
6. Barium Chloride Test No White Precipitate Absence of sulphate.
To a few drops of the salt solution or
extract, dil. HCl and Barium Chloride
soluble are added.
CONFIMATORY TEST FOR ANION
EXPERIMENT OBSERVATION INFERENCE
Nitrate – Brown ring Test Brown ring formed at the Presence of Nitrate (NO3- ) is
To a few drops of the salt junction of the liquids. confirmed.
solution/extract, dil. sulphuric acid is
added and an equal volume of ferrous
sulphate (freshly prepared) is added.
Then conc. Sulphuric acid is added along
the walls of the test tube.
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TEST FOR CATIONS
Cation Group analysis ( Group Separation)
EXPERIMENT OBSERVATION INFERENCE
Group I: White precipitate (PbCl2) Presence of lead (Pb2+)
To a few drops of salt solution dil.HCl is (1 group)
added
CONFIRMATORY TEST FOR CATION
EXPERIMENT OBSERVATION INFERENCE
1. Lead Yellow precipitate was
To a few drops of the salt solution, 2ml obtained.
of potassium chromate solution is
added Presence of lead (Pb2+)
2. To a few drops of the salt solution Yellow precipitate which is Confirmed
Potassium lodide solution is added dissolve in water on heating and
reappears on cooling as shiny
golden crystals.
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RESULT
The given salt contains
Acid Radical is Nitrate (NO3-)
Basic Radical is Lead (Pb2+)
Therefore, the given salt is Lead Nitrate Pb(NO3)2
