paper 3 Flashcards
test for sulfates
+HCl
+barium chloride
if sulfate, white precipitate of BaSO4 will form-insoluble
displacement reactions what colour solution does potassium iodide form if displaced by another halide
brown (I2)
displacement reactions what colour solution does potassium bromide form if displaced by another halide
orange (Br2)
equation to make bleach (sodium hydroxide+Cl2)
equation to make chlorate ions that kill bacteria in water
test for halide ions what do u add?
dilute nitric acid
silver nitrate
what are the results for the halide test?
chloride ion=white p
bromide ion=cream
iodine ion=yellow
further test what occurs when you add dilute/ conc ammonia to the precipitates for the halide tests
chloride ion, precipitate dissolves in dilute
bromide, partially in dilute, fully in conc
iodine, doesnt dissolve
G2 cations: flame test what are the results for, Ca, Sr,Ba
Ca=dark red
Sr=red
Ba=green
how to test for ammonium ions+ result
+ NaOH+gently heat
ammonia gas will turn damp red litmus paper blue
test for hydroxides with litmus paper
damp red litmus paper=blue
test for carbonates
+HCl=CO2 gas
bubble through limewater, cloudy if CO2
