metals and reactivity series Flashcards
1
Q
appearance-
blue
A
Cu++
2
Q
appearance-
green
A
cu++ or fe++
3
Q
appearance
yellow
A
fe+++
4
Q
appearance
brown
A
fe+++
5
Q
appearance
shiny metal or black
A
uncombined metal
6
Q
flame test method
A
- pour 2cm3 of concentrated HCl into a crucible
- clean a platinum or nichrome wire or silica glass flame test rod by dipping into the acid and then into the blue flame (non-luminous) several times to remove impurities
- once clean, the rod will give no colourarion to flame.
- put half a spatula of the unknown onto a ceramic mat
- dip flame test rod into acid again (glue)
- put rod into out part of Bunsen
- observe colour
7
Q
flame test
brick red / dull orange
A
ca++
8
Q
flame test
intense yellow (masked by cobalt blue glass)
A
Na+
9
Q
flame test
green with blue centre
A
cu++
10
Q
lilac flame
A
K+
11
Q
bright red flame
A
Li+
12
Q
no colouration
A
mg++ or NH4+
13
Q
appearance -
white powder or colourless solution
A
not a transition metal ion present as these give colour to compounds
