C2.11 Ion Tests Flashcards
What is spectroscopy used for?
To detect the presence of very small amounts of elements which leads to the discovery of new elements such as rubidium and caesium
How do you test for carbonate ions?
Bubble the limewater in the solution, if it turns milky there is carbon dioxide which confirms that it is a carbonate
How do you test for chloride ions?
Add dilute nitric acid to the solution and shake. Add a few drops of silver nitrate to the solution, if a white precipitate is formed of silver chloride then the sample contains chloride ions.
How do you test for sulfate ions?
Add dilute hydrochloric acid to the solution, shake it. Add a few drops of barium chloride, if a white precipitate of barium sulfate is for,we it contains sulfate ions
What colour does sodium, potassium, calcium and copper (II) produce in a flame test?
Sodium - yellow
Potassium - lilac
Calcium - red
Copper (II)
