Salt analysis chemistry practical part -1

SYSTEMATIC PROCEDURE FOR INORGANIC QUALITATIVE ANALYSIS  

I. PRELIMINARY TESTS 

experiment	observation	interference
1. Colour of the substance is noted.           2. A little of the salt is heated in a dry test tube                   3. FLAME TEST: -a little of the salt is made into a paste with one or two drops of con.HCl in a watch glass. A little of the paste is shown in Nonluminous flame by platinum wire	a) Blue  b) Pink   c)Green   d)Colourless       a) A colourless gas which turned lime water milky   b) A colourless gas with burnt smell of sulphur   c) Colourless gas with pungent smell. Turns Red litmus paper blue.  d) Reddish brown vapours turning acidified ferrous sulphate paper brown   a) Blue colour     b) Pale green     c)Brick Red     d)Crimson Red	a) May be due to presence of Copper.  b) May be due to presence of Manganese.   c) May be due to presence of Nickel.   d) Absence of Copper, Nickel, Manganese.  a) Presence of Carbonate.     b) Presence of Sulphide.     c) Presence of Ammonium salt.       d) Presence of Nitrate.       a) Presence of Copper     b) Presence of Barium.     c) Presence of Calcium.     d) Presence of Strontium.

 
ANALYSIS OF ANIONS  

The scheme of analysis of anions consists of identification and confirmatory tests. Once the presence of radical is detected by identification tests, proceed to do the confirmatory tests of that ion. 

IDENTIFICATION TESTS
1.ACTION OF Dil.HCl -To a little of the substance about 1ml of dil.HCl is added slowly and heated.           2. ACTION OF Dil.H2SO4 a little of the substance is rubbed with Dil. H2SO4 in a watch glass     3. Action of Con. H2SO4-   To a small amount of given salt taken in a dry test tube,  add 2-3 ml of Con. H2SO4 and gently warmed.	a) Vigorous or brisk effervescence with evolution of colourless, odorless gas   b) Colourless gas with smell of rotten eggs.   c)No characteristic observation       a) smell of vinegar     b) No characteristic observation   a) Reddish brown vapours turning moist fluorescent paper red.   b) Colourless gas with pungent smell giving dense white fumes with a glass rod dipped in NH4OH solution is shown in the mouth of test tube.   c) Violet coloured vapours turning starch paper blue or violet.   d) No characteristic observation	a) Presence of Carbonate ion is identified.   b) Presence of Sulphide ion is identified.   c) Absence of carbonate & sulphide.       a) Presence of acetate ion is identified.   b) Absence of acetate     a) Anion may be bromide ion is identified.    b) Anion may be chloride ion is identified.         c)Anion may be Iodide ion is identified.     d) Absence of bromide, chloride, iodide
4. To a small amount of given salt taken in a dry test tube, add 2-3 ml of Con. H2SO4 and heated strongly. To boiling solution add paper ball or Copper tunings is added.     5. Action of Barium chloride -To the little of salt solution a little of barium chloride solution is added.	a) Reddish brown vapours turning acidified ferrous sulphate paper brown.     b) No characteristic observation     a) A white precipitate insoluble in dil.HCl is formed.     b) No characteristic observation	a) Presence of Nitrate is identified.       b) Absence of Nitrate.       a) Presence of sulphate is identified     b) Absence of Sulphate.