chemistry qualitative analysis memorisation

Created by

chloe poh

Cards (27)

carbonate, CO3^2- 
Add dilute acid, then test for carbon dioxide gas
result: effervescence, carbon dioxide produced
chloride, Cl- 
Acidify with dilute nitric acid, then add aqueous silver nitrate
result: white ppt
bromide, Br- 
Acidify with dilute nitric acid, then add aqueous silver nitrate
result: cream ppt
iodide, I- 
Acidify with dilute nitric acid, then add aqueous silver nitrate
result: yellow ppt
nitrate, NO3- 
Add aqueous sodium hydroxide, then aluminium foil; warm carefully
result: ammonia produced
sulfate, SO4^2- 
Acidify with dilute nitric acid, then add aqueous barium nitrate
result: white ppt
sulfite, SO3^2- 
Add a small volume of acidified aqueous potassium manganate(VII)
result: acidified aq potassium manganate (VII) [purple --> colorless]
aluminium, Al^3+ 
Effect of aqueous sodium hydroxide: white ppt., soluble in excess, giving a colourless solution
Effect of aqueous ammonia: white ppt., insoluble in excess
ammonium, NH4+ 
Effect of aqueous sodium hydroxide: ammonia produced on warming
Effect of aqueous ammonia: -
calcium, Ca^2+ 
Effect of aqueous sodium hydroxide: white ppt., insoluble in excess
Effect of aqueous ammonia: no ppt. or very slight white ppt.
chromium(III), Cr^3+ 
Effect of aqueous sodium hydroxide: green ppt., soluble in excess
Effect of aqueous ammonia: green ppt., insoluble in excess
copper(II), Cu^2+ 
Effect of aqueous sodium hydroxide: light blue ppt., insoluble in excess
Effect of aqueous ammonia: light blue ppt., soluble in excess, giving a dark blue solution
iron(II), Fe^2+ 
Effect of aqueous sodium hydroxide: green ppt., insoluble in excess, ppt. turns brown near surface on standing
Effect of aqueous ammonia: green ppt., insoluble in excess, ppt. turns brown near surface on standing
iron(III), Fe^3+ 
Effect of aqueous sodium hydroxide: red-brown ppt., insoluble in excess
Effect of aqueous ammonia: red-brown ppt., insoluble in excess
zinc, Zn^2+ 
Effect of aqueous sodium hydroxide: white ppt., soluble in excess, giving a colourless solution
Effect of aqueous ammonia: white ppt., soluble in excess, giving a colourless solution
ammonia, NH3 
Turns damp red litmus paper blue
carbon dioxide, CO2 
Turns limewater milky
chlorine, Cl2 
Bleaches damp litmus paper
hydrogen, H2 
'Pops' with a lighted splint
oxygen, O2 
Relights a glowing splint
sulfur dioxide, SO2 
Turns acidified aqueous potassium manganate(VII) from purple to colourless
Lithium Li+ 
red
Sodium Na+  
yellow
Potassium K+  
lilac
Barium Ba2+ 
light green
Copper(II) Cu2+ 
blue green
Calcium Ca2+ 
orange red