chemical analysis Flashcards
give examples of mixtures
- Paints
- Fuels
- Alloys
- Fertilisers
Rf value equation
Rf value =
distance substance moved/distance mobile phase moved
test for hydrogen
lit splint produced squeaky pop
test for oxygen
will relight glowing splint
test for carbon dioxide
causes limewater to turn cloudy when bubbled through it
test for chlorine
bleaches blue litmus paper
what colour flames for:
-Lithium
-Sodium
-Potassium
-Calcium
-Copper
-Lithium - crimson
-Sodium - yellow
-Potassium- lilac
-Calcium - orange/red
-Copper - green
metal ions in solution test results (add sodium hydroxide to make metal hydroxide)
-Aluminium/Calcium/Magnesium -WHITE PRECIPITATE
-Copper (II)- BLUE PRECIPITATE
-Iron (II) - GREEN PRECIPITATE
-Iron (III) - BROWN PRECIPITATE
what is flame emission spectroscopy
analysing the wavelength of light emitted from a flame, which can be used to identify ions accurately
what will halide ions produce
a white precipitate when mixed with silver nitrate & nitric acid
how is carbon made
when carbonated react with an acid
what colour are the different ions
chloride - white
bromide - cream
iodide - yellow
