CATIONS Flashcards
a branch science of which deals with the
study of laws, principles and processes of DETERMINATION of composition and IDENTIFICATION of a material.
ANALYTICAL CHEMISTRY
“measurement science”
ANALYTICAL CHEMISTRY
“What is?”
Reveals the IDENTITY of the substance
QUALITATIVE
“How much?”
Indicates the AMOUNT of each substance
QUANTITATIVE
CATIONS GROUP 1 PRECIPITANT
6M HCl
The INSOLUBLE Chlorides
GROUP 1
CATIONS GROUP 2 PRECIPITANT
5% THIOACETAMIDE IN DILUTED ACID
The ACID INSOLUBLE Sulfides
GROUP 2
-INsoluble in Na2S
2A
-SOluble in Na2S
2B
CATIONS GROUP 3 PRECIPITANT
5% THIOACETAMIDE IN NH3
- SOluble in 1M HCl
3A
-INsoluble in 1M HCl
3B
Cd+2, Sn+2 (brown) As+2, As+5
YELLOW
Sb+2 , Sb+5(orange-red)
ORANGE
Zn+2
WHITE
Mn+2
PINK
Cu+2, Bi+3, Pb+2, Sn+4
Hg+2, Co+2, Ni+2, Ag+, Fe+2
BLACK
All precipitates are WHITE.
GROUP 4