metal hydroxides Flashcards
1
Q
precipitation
A
the merge of two soluble substances to produce an insoluble solid
2
Q
what solution can be used to identify some cations?
A
sodium hydroxide
3
Q
copper
A
blue precipitate
4
Q
blue precipitate
A
copper
5
Q
calcium
A
white
6
Q
white
A
calcium, aluminium, magnesium
7
Q
iron (ii)
A
green
8
Q
green
A
iron (ii)
9
Q
iron (iii)
A
brown
10
Q
brown
A
iron (iii)
11
Q
magnesium
A
white
12
Q
alumnium
A
white, then dissolves if excess NaOH is added
13
Q
how can you tell the difference between aluminium and magnesium/calcium
A
only the aluminium hydroxide precipitate dissolves in excess sodium hydroxide solution
14
Q
general equation
A
metal sulfate/chloride etc. + sodium hydroxide —–> metal hydroxide + sodium sulfate/chloride etc.
