ADDITION OF AQUEOUS SODIUM HYDROXIDE. Flashcards
1
Q
Al 3+ , Pb 2+ or Zn 2+ ions present.
A
A white precipitate was formed which
was soluble in excess.
2
Q
Ca 2+ ions present.
A
A white precipitate was formed which
was insoluble in excess.
3
Q
NH3 gas evolved.
NH 4 + ions present.
A
No precipitate formed
4
Q
Cu 2+ ions present.
A
A blue precipitate was formed which
was insoluble in excess.
5
Q
Fe 3+ ions present.
if it’s green?
A
A red-brown precipitate was formed which
was insoluble in excess.
fe 2+
6
Q
why AQUEOUS SODIUM HYDROXIDE is used
A
help in the determination of the identity of the cation
present.
