ANALYSIS OF GROUP 2 ANIONS (PRACTICALS)

Group II anions

This known solution belongs to what group?, Carbonate, Sulfite, sulfide, Chloride, Bromide, Iodide, Nitrate and Nitrite

Colorless, Odorless CO2

In the elimination test for volatile acids, what indicates the presence of carbonate ion?

Colorless SO2 gas with sharp odor

In the elimination test for volatile acids, what indicates the presence of sulfite ion?

Colorless H2S gas with rotten egg odor

In the elimination test for volatile acids, what indicates the presence of sulfide ion

Colorless NO gas oxidized to brown, sharp odored NO2 gas

In the Elimination test for volatile acids, what indicates the presence of nitrate ion?

Violet Vapor

In the elimination test for volatile acids, what is observed in Iodine when iodides and oxidizing agents occur together?

Chromate ion, Sulfide ion

Elimination test for volatile acids fail in the presence of oxidizing agents such as? And reducing agents such as?

6M H2SO4

What is added into the 10 drops of unknown solution in the elimination test for volatile acids?

White ppt BaCO3, containing Barium Hydroxide

For the positive test for carbonate ion, what indicates the presence of carbonate ion?

Addition of 6M HAc till acidic and BaCO3 dissolves

In the positive test for carbonate ion, What is needed to ensure that the precipitate is barium carbonate?

Positive test for Carbonate Ion

What type of test is this? White precipitate of BaCO3

Zinc, 2ml of Ba(OH)2

What is placed in the 1ml anion solution in the test for positive carbonate ion? and what and how many ml of the solution is placed on the 2nd vial at the end of the other rubber tubing?

1ml of 3% H2O2, 10 drops 6M HCl

In the positive test for carbonate ion, What is added to the vial that contains the sample and zinc?

Positive test for Sulfide Ion

This type of test has a brown or black coloration of PbS

0.1 Pb (NO3)2 and 6M NaOH

In the vial in the positive test for sulfide ion, what solutions were mixed together to create the plumbite solution?

3 drops

How many drops of anion solution was added to the plumbite solution?

Black Coloration or PPT of PbS

What is the result of the positive test for sulfide ion?

6M HCl, 0.1M BaCl or Ba(NO3)2

In the positive test for sulfite ion, What is added into the anion solution?

White ppt

In the positive test for sulfite ion, what indicates the presence of sulfite in the anion solution?

6M HNO3, 0.1M AgNO3

For the Positive test for chloride ion, what was added to the anion solution?

4mL water, 6M NH4OH, 0.1M AgNO3

What was added to the thoroughly washed ppt in the positive test for chloride ion?

Heavy white precipitate

In the Positive test for Chloride Ion, What confirms the presence of chloride ion?

Water, 6M HNO3, CCl4, 0.1M Fe (NO3)3

In the positive test for iodide ion, What is added to the anion solution?

Violet Color in CCI4 layer

In Positive test for Iodine Ion, what indicates the presence of iodide ion?

Brown color

In the positive test for bromide ion, What is the result?