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GEOFFREY O NYABUTO PROCEDURE QUALITATIVE ANALYSIS OF ANIONS UNKNOWN ANION solving 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 coterie rods, spatula. PRECAUTIONS 1. HNO3 is corrosive and bottomland cause damage to the skin. 2. Use diverse spatulas and test tube for different experiment and procedure. impediment OF sulphate ION Place 10 drops of the known root word containing sulphate ion then add BaCl2. A discolour fall raven will be formed. add up HNO3 to the mixture, the black-and-blue lessen dissolves. Sulfate ions do non discolorize imperial acidified potassium permanganate. curb OF SO2-3 bestow 10 drops of known resolving containing sulfite ions to BaCl2. White abrupt is formed. Add HNO3 to the m ixture, gas is evolved and the white precipitate dissolves. When added to acidified KMnO4 it constitute 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 gradual response. 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 ga s is evolved. It decolorizes purple acidifie! d KMnO4. CONFIRMATION OF NITRATE ION Add NaNO3 to a solution containing acidified Fe2+ it forms a reddish brown mob on the test tubes. If BaCl2 is added to NaNO3 there is no observable channelize 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.net

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