Paper

GEOFFREY O NYABUTO
PROCEDURE
QUALITATIVE ANALYSIS OF ANIONS
UNKNOWN ANION SOLUTION
etiolatethorn contain some or all of the following:Na2SO4, NaSO3, Na2CO3, Na3PO4, NaNO2, NaNO3.
REQUIREMENTS
18 test metros and test tube racks, 400ml and 250ml beaker , stir inner circle rods, spatula.
PRECAUTIONS
1. HNO3 is corrosive and bottomland cause damage to the skin.
2. Use different spatulas and test tube for different experiment and procedure.
CONFIRMATION OF SULFATE ION
Place 10 drops of the known root word containing sulfate ion then add BaCl2. A discolour fall down will be formed. add up HNO3 to the mixture, the white precipitate dissolves. Sulfate ions do non decolorize imperial acidified potassium permanganate.
CONFIRMATION OF SO2-3
Add 10 drops of known resolving containing sulfite ions to BaCl2. White precipitate is formed. Add HNO3 to the mixture, gas is evolved and the white precipitate dissolves. When added to acidified KMnO4 it get alongs decolourised.
CONFIRMATION OF CARBONATE ION
Add 10 drops of known base containing carbonate to BaCl2 .White precipitate is formed. Add HNO3, gas is evolved. Carbonates do not decolorize acidified KMnO4.




CONFIRMATION OF PHOSPHATE
Add ammonium molybdenate then heat, a yellow precipitate appears or add BaCl2, a white precipitate is formed. Add HNO3 the white precipitate forms a dull solution. Does not decolorize acidified KMnO4.
CONFIRMATION OF NITRITE ION
When BaCl2 is reacted with NaNO2 it forms a colorless precipitate. When the solution formed is reacted with HNO3 gas is evolved. It decolorizes purple acidified KMnO4.
CONFIRMATION OF NITRATE ION
Add NaNO3 to a solution containing acidified Fe2+ it forms a reddish brown ring on the test tubes. If BaCl2 is added to NaNO3 there is no observable reassign and if HNO3 is added to the solution, there will be no observable change. It does not decolorize acidified KMnO4.
TEST FOR IONS IN UNKNOWN SOLUTIONS
1....If you want to get a full essay, order it on our website: Orderessay



If you want to get a full essay, wisit our page: write my essay .