TESTS RP Flashcards
what color flame does lithium produce?
crimson
what color flame does sodium produce?
yellow
what color flame does potassium produce?
lilac
what color flame does calcium produce?
orange-red
what color flame does copper produce?
green
test and result for calcium (cation)?
add sodium hydroxide
white precipitate formed
test and result for copper II (cation)?
add sodium hydroxide
blue precipitate formed
test and result for iron II (cation)?
add sodium hydroxide
green precipitate formed
test and result for iron III (cation)?
add sodium hydroxide
brown precipitate formed
test and result for aluminium (cation)?
add sodium hydroxide
white precipitate formes –> redissolves with excess NaOH
test and result for magnesium (cation)?
add sodium hydroxide
white precipitate formed
test and result for chlorine gas?
place a piece of damp litmus paper inside test tube
damp litmus paper turns red then bleaches white
test and result for oxygen gas?
place glowing splint inside test tube
the glowing splint will relight
test and result for carbon dioxide gas?
bubble gas through limewater
solution will turn cloudy
test and result for hydrogen gas?
hold lit splint at open end of test tube
should hear a squeaky pop
test and result for carbonates?
add dilute HCL
(you will see fizzing as CO2 is produced)
collect gas and bubble through lime water
lime water will turn cloudy
test and result for sulfates?
add a few drops of HCL
add barium chloride solution
a white precipitate will form
test and result for a chloride?
add dilute nitric acid
add silver nitrate solution
white precipitate will form
test and result for a bromide?
add dilute nitric acid
add dilute silver nitrate
cream precipitate will form
test and result for an iodide?
add dilute nitric acid
add dilute silver nitrate
yellow precipitate formed
test for an alkene?
add bromine water
from orange/brown to colorless
test for an alkane?
add bromine water
stays bright orange