Topic 9- Part 1 (Test for ions) Flashcards
Why are tests for ions unique?
-Help determine which ion is present
Flame test for ions
-Dip clean nicrome wire into HCI (clean it further/get rid of impurities)
-Place ion on nicrome wire
-in flame
What colour does lithium ion go?
Red
What colour does sodium ion go?
Yellow
What colour does potassium ion go?
Lilac
What colour does calcium ion go?
Orange-red
What colour does copper ion go?
Blue-green
Sodium hydroxide test for ions?
-Add a few drops of sodium hydroxide
-to 1cm^3 of metal ion
What colour does aluminium ion go?
-white precipitate
-Dissolves in NAOH
sodium hydroxide
What colour does calcium ion go?
-White precipitate
What colour does copper ion go?
-Blue precipitate
What colour does Iron II ion go?
-Green precipitate
What colour does Iron III ion go?
-Brown precipitate
What is the chemical test for ammonia?
-Add ammonium nitrate
-Add sodium hydroxide
-Heat
-If damp red litmus paper turns blue
Test for carbonates?
-Add carbonate + HCl (produces carbon dioxide)
-Bubble gas poduced through limewater
-If limewater cloudy carbonate
