C4.2 Flashcards
What is the flame test result for Lithium?
Red
What is the flame test result for Sodium?
Yellow
What is the flame test result for Potassium?
Lilac
What is the flame test result for calcium?
Orange-red
What is the flame test result for copper?
Green-blue
What colour precipitate is formed when sodium hydroxide is added to an ionic solution containing a Fe(II)?
Green
What colour precipitate is formed when sodium hydroxide is added to an ionic solution containing a Fe(III)?
Orange-brown
What colour precipitate is formed when sodium hydroxide is added to an ionic solution containing a Cu(II)?
Blue
What colour precipitate is formed when sodium hydroxide is added to an ionic solution containing a Ca?
White
What colour precipitate is formed when sodium hydroxide is added to an ionic solution containing a zinc?
White
How do you detect sulphate ions?
Add a few drops of HCl (aq) and then a few drops of BaCl(aq). If a white propitiate is produced, the solution contained sulphate ions.
How do you detect carbonate ions?
Add a few drops of HCl(aq) and bubble any gas produced through limewater. If the limewater turns cloudy, carbonate ions were present.
How do you detect halide ions?
Add a few drops of nitric acid then a few drops of silver chloride(aq). If a precipitate is produced, chloride, bromide or iodide is present in solution.
What colour precipitate is formed when silver nitrate solution is added to a solution containing chloride ions.
White
What colour precipitate is formed when silver nitrate solution is added to a solution containing bromide ions?
Cream
What colour precipitate is formed when silver nitrate solution is added to a solution containing iodide ions.
Yellow
How can you differentiate between calcium hydroxide and zinc hydroxide which are both white solids?
Zinc hydroxide dissolves into a colourless solution when an excess of sodium hydroxide is added.
What colour flame is needed to perform a flame test?
Blue
What is the chemical test for chlorine?
Damp litmus paper is bleached white when it is placed in chlorine. If damp-blue litmus paper is used, the paper turns red then white.