Anions

Qualitative Analysis-Part 2 Anions

September 18th, 2013
Submitted to: Ron
Submitted by: Chris
Lab Partner: Neil

Objective:
Using qualitative analysis we will run a series of experiments to test for negative anions in different solutions.

Rational:
These experiments will allow detection of anions in a given solution.

Method:
CO3 Solution
Iodine Solution
6M Nitric Acid
SO4 Solution
Sulphric Acid(H2SO4)
Chloride Solution
6M Asetic Acid(CH3COOH)
Barrium Chloride(BaCl2)
6M HCl(Hydrochloric acid)
Silver Nitrate(AgNO3)
1M Potassium Nitrate(KNO2)
Calcium Chloride (CaCl2)
Barrium Hydroxide
Ammonium Hydroxide (NH3OH)
Methylene Chloride

Test Tube/Test Tube Holder
Eye Dropper
Eye Dropper
Beaker
Pipette
Pipette Bulb
Litmus Paper
Hot Plate

Observations/Calculations:
CO3 + H2SO4 = bubbly reaction, little to no colour change.
CO3 + 6M HCl = Barrium hydroxide began to go cloudy, indicating the presence of BaCO3(Carbonate anions)

Chloride Solution + 0.1M AgNO3 =white precipitate formed, very fine texture.
Iodide solution + 0.1M AgNO3 =yellow/white precipitate formed, cloudy texture.
Silver Chloride + ammonium hydroxide = white precipitate forms, slowly begins to disappear. Adding HNO3 the reappearance of a white precipitate began, indicating the presence of the chloride.
SO4 solution + 0.5mL of BaCl2-CaCl2 = heated for about 10minutes, fine white precipitate throughout test tube.
5drops of 6M HCl + SO4 = no change indicating no reaction took place, confirming that sulphate is not present in solution.

Unknown Substance:
When testing for carbonates, little to no reaction took place indicating no presence of carbonates. While testing for Chloride and Iodide, my solution reacted with sulphric acid and a yellow-ish colour change took place. No reaction took place when added to hydrochloric acid or barium hydroxide. Sulphate was tested for and no reactions or changed underwent, confirming