Flame And Precipitation Tests Flashcards
Lithium flame test
Red
Sodium flame test
Yellow/orange
Potassium flame test
Lilac
Calcium flame test
Orange/red
Barium flame test
Light green
Chromium flame test
green
Copper flame test
Blue/green
Carbonate test
add dilute acid and test for carbon dioxide
nitrate test
add aluminium foil and sodium hydroxide, then test for ammonia
sulfate test
add dilute nitric acid, then barium nitrate, a white ppt should form (barium sulfate)
Or replace with HCl and BaNO3
sulfite test
add a dilute acid (HCl) and potassium manganate(VII), should turn from purple to colourless
chloride test
add dilute nitric acid, then add silver nitrate, should form white ppt
bromide test
add dilute nitric acid then add silver nitrate, should form cream ppt
iodine test
add dilute nitric acid, then add silver nitrate, should form yellow ppt
Aluminium NaOH test
white ppt, soluble in excess
ammonium NaOH test
no ppt, but ammonia is formed
Calcium NaOH test
white ppt, insoluble in excess
Chromium NaOH test
green ppt, soluble in excess
copper NaOH test
light blue ppt, insoluble in excess
Iron (II) NaOH tset
green ppt, insoluble in excess
Iron (III) NaOH test
brown ppt, insoluble in excess
Zinc NaOH test
white ppt, soluble in excess
Aluminium NH3 test
white ppt, insoluble in excess
Ammonium NH3 test
no reaction
Calcium NH3 test
Little bit of white ppt
Chromium NH3 test
grey green ppt, partially soluble in excess
copper NH3 test
light blue ppt, soluble in excess, creating a deep blue solution
Iron (II) NH3 test
Green ppt, insoluble in excess
Iron (III) NH3 test
Brown ppt, insoluble in excess
Zinc NH3 test
white ppt, soluble in excess
Ammonia test
damp red litmus paper turns blue
carbon dioxide test
bubble through limewater, from clear to milky
chlorine test
bleaches any litmus paper, paper turns white
hydrogen test
lighted splint makes a squeaky pop sound
oxygen test
glowing splint relights
sulfur dioxide
using aqueous potassium manganate(VII), from purple to colourless
