Chemical analysis Flashcards
Test for chlorine
Damp, blue litmus paper (blue to white)
Test for oxygen
Glowing splint (splint will be relit)
Test for hydrogen
Squeeky pop (lit splint)
Test for carbon dioxide
Limewater (turns cloudy)
Test for carbonates
Add dilute HCl, then check for CO2 (using limewater)
Test for sulfates
Add dilute HCl, add barium chloride, white PPT formed
Test for halides
Add dilute nitric acid, add silver nitrate, different halides = different ppt
Chloride ions = white ppt
Bromide ions = cream ppt
Iodide ions = yellow ppt
What colour flame is a Lithium ion?
Crimson
What colour flame is a Sodium ion?
Yellow
What colour flame is a Potassium ion?
Lilac
What colour flame is a Calcium ion?
Orange - red
What colour flame is a Copper ion?
Green
What ppt does Calcium form?
White ppt (reacted with sodium hydroxide)
What ppt does iron II form?
Green ppt (reacted with sodium hydroxide)
What ppt does iron III form?
Brown ppt (reacted with sodium hydroxide)