Metal Hydroxides Flashcards
Colour of precipitates for different substances.
1
Q
What hydroxides give a WHITE PRECIPITATE?
A
Aluminium hydroxide, magnesium hydroxide, calcium hydroxide
2
Q
IRON lll (Fe3+) hydroxide gives what colour precipitate?
A
Brown
3
Q
What ion hydroxide gives a BLUE precipitate?
A
Copper (II) hydroxide
4
Q
IRON II (Fe2+) hydroxide gives what colour precipitate?
A
Green
5
Q
Which hydroxide out of Calcium, Magnesium and Aluminium (white precipitates) dissolves in excess NaOH to give a colourless solution?
A
Aluminium hydroxide
6
Q
How can you tell if a white precipitate is Aluminium Hydroxide?
A
Dissolve in excess NaOH (sodium hydroxide)
7
Q
What is added to the unknown solution to test for metal ions (to create the precipitate)?
A
Sodium hydroxide
