Flame tests Flashcards
Test for hydrogen
burning splint
squeaky pop
Test for oxygen
glowing splint
splint relights
Test for carbon dioxide
bubble the gas through limewater (calcium hydroxide)
turns milky
Test for ammonia
damp red litmus paper
turns blue
ammonia reaction with hydrogen chloride gas
forms a white smoke of ammonium chloride
flame test - description
Take a sample of a metal on a wire and put it in a flame, the flame will turn a specific color
flame test - lithium
red
flame test - sodium
yellow
flame test - potassium
lilac
flame test - calcium
orange red
flame test - copper
blue green
ion test (cation) - description
using NaOH(aq) to identify the gas evolved
ion test (cation) - ammonia
forms NH3
turns red damp litmus paper blue
ion test (cation) - copper (II)
blue precipitate
ion test (cation) - Iron (II)
green precipitate
ion test (cation) - Iron (III)
brown precipitate
ion test (anion) - description
using acidified silver nitrate solution
acidified barium chloride solution
hydrochloric acid
ion test (anion) - halide
add dilute nitrate acid, followed by silver nitrate solution
chloride - white precipitate
bromide - cream precipitate
iodide - yellow precipitate
ion test (anion) - sulfate
add dilute hydrochloric acid, followed by barium chloride solution
white precipitate forms
ion test (anion) - carbonate ions
react with dilute acids to create carbon dioxide
this gas can be bubbled through limewater
presence of water - copper
use anhydrous copper (II) sulfate
turns from white to blue
presence of water - cobalt
use anhydrous cobalt (II) sulfate
turns from pink to blue
