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Chemistry AS
periodic table and energy
Qualitative analysis
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Created by
Seda yilmaz
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Cards (5)
test for halides
add AgNO3
Cl- =
white
precipitate
Br- =
cream
precipitate
I- =
yellow
precipitate
but it is
hard
to tell the difference do further experiments are done
precipitate is formed by
silver nitrate
further testing for halides -
Cl- = the ppt will disappear when reacted with
dilute
NH3
Br- = the ppt will disappear when reacted with
concentrated
NH3
I- = the ppt will not disappear when reacted with
concentrated
/dilute NH3
test for ammonia (NH4+) - add
NaOH
and
heat
, if
NH4+
ions are present it will give off
NH3
which turns
red
litmus paper
blue.
test for carbonate CO3^2- add
acid
to suspected carbonate. fizzing is produced and collect the gas and if turns
lime
water
cloudy
then it is present
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