Qualitative Analysis

Qualitative Analysis 1.

Qualitative analysis is a series of of tests conducted on a chemical substance to identify the salt component or components in it.

2.

Through qualitative analysis, the cation and anion present in a salt are determined.

3.

To identify the cation and anion in a salt, the the following following tests are usually conducted. Complete the diagram. UNKNOWN SALT

1. "hysical properties

3. !dd distilled water 

$. %ffect of  heat

2. bserved colour of salts

#. Test Test for gases Gas released 

Soluble?

 Reagent 

 Inference :  Presence of

CO32-

CO2 &es &es

Cl2 (on in aqueous solution

SO42NO2

). Confirmatory tests for ions

. Test for  anions

'amp blue litmus  paper 

*. Test for  cations

*.asing  /a0

+. Test for specific cations

* bsing  /03 aq-

1

NO3 -

$. Colour of alts a.

ost salts are colourless aqueous solution or white salts.

 b.

alts of transition metals are coloured because they form coloured ions.

%4amples 5 Ion

abcc.

Colour

copper ((- ions, Cu26 iron ((- ions, 7e26 iron (((- ions, 7e36

Complete the following table 5

6

26

36

&ellow when hot white when cold

(nsoluble

sound :lowin  Method  5 g splinter  Observation 5

0ydroge Colourles n s

4ygen

'ea(en t used

;ime water 

 Method  5