Cation confirmatory test Flashcards
1
Q
K+
A
Both no change
2
Q
Na+
A
Both no change
3
Q
NH4+
A
No change but have pungent smell at excess NaOH solution
4
Q
Ca2+
A
Insoluble in NaOH
No change in NH3
5
Q
Mg2+
A
Both insoluble
6
Q
Zn2+
A
Soluble at both
7
Q
Al3+
A
Soluble in NaOH
Insoluble in NH3
No reaction
8
Q
Pb2+
A
Soluble in NaOH
Insoluble in NH3
Have reaction with KI, NaCl, Na2SO4
9
Q
Fe2+
A
Green precipitate
10
Q
Fe3+
A
Brown precipitate
11
Q
Cu2+
A
Blue precipitate (Insoluble in NaOH, Soluble in NH3)
