Unit 5 Practical Flashcards
Lithium flame test
Red
Sodium flame test
Yellow
Potassium flame test
Lilac
Copper flame test
Blue-green
Barium flame test
Apple green
Calcium flame test
Orange red
Strontium flame test
Crimson
Rubidium flame test
Violet- red
Lead flame test
Grey
Magnesium flame test
White
Caesium flame test
Blue-violet
Test for sulphates?
HCl + BaNO3 - white ppt
What are the 2 carbonate tests?
Acid - fizzing
Limewater - cloudy
Test for nitrates?
Iron (III) sulphate + H2So4 - brown ring
What are the halide tests?
Nitric acid + silver nitrate -
chlorine = white
bromine = cream
iodine = pale yellow
Copper ppt colour
Blue
Iron (II) ppt colour
Green
Iron (III) ppt colour
Brown
Chromium ppt colour
grey/ green
Magnesium ppt colour
White
Aluminium ppt colour
White - dissolves in excess NaOH
Zinc ppt colour
White - dissolves in excess NaOH and NH3
Lead ppt colour
White
What are the 3 gas tests?
hydrogen - squeaky pop test
oxygen - relights glowing splint
carbon dioxide - splint goes out, limewater
How to test for alkene?
Bromine water
Orange to colourless
How to test for halogenalkanes?
Sodium hydroxide
Nitric acid/ silver nitrate
Cl - white
Br - cream
I - yellow
How to test for primary and secondary alcohols?
Warm dichromate - orange
PCl5 - white fumes
Carboxylic acid + sulphuric acid - sweet smell (ester)
How to test for aldehydes?
Tollens - silver
Fehlings - blue to red
Dichromate - orange to green
How to test for carboxylic acids?
Carbonate - fizzing
Limewater - clear to cloudy
How to test for phenol?
Iron (III) chloride solution - clear to purple
What are the soluable compounds?
NAG SAG
Nitrates (NO3)
Acetates (C2H3O2)
Group 1 (Li+, Na+ ect)
Sulfates (SO42)
Ammonium (NH4+)
Group 7 (F-,Cl- ect)
What are the exceptions to soluable compounds?
PMS and Castro Bear
P (pb2+, lead)
M (mercury, Hg2+)
S (silver, ag+)
Ca2+
Sr2+
Ba 2+
