Save
...
inorganic y1
group 7
identifying anions
Save
Share
Learn
Content
Leaderboard
Share
Learn
Created by
erin douglas
Visit profile
Cards (24)
What is the formula for carbonate ions?
CO32-
View source
How can you confirm the presence of carbonate ions?
Add dilute
nitric acid
and observe
effervescence
View source
What gas is evolved when carbonate ions react with acid?
Carbon dioxide
(CO2)
View source
What does the reaction of carbonate ions with dilute nitric acid produce?
CO2
and
H2O
View source
What is the test for confirming CO2 gas?
Passing it through
limewater
View source
What happens to limewater when CO2 is present?
It turns cloudy due to
calcium carbonate
View source
What is the formula for sulfate ions?
SO42-
View source
How can you confirm the presence of sulfate ions?
Add dilute
nitric acid
and
barium
ions
View source
What precipitate forms when sulfate ions react with barium ions?
Barium sulfate
(
BaSO4
)
View source
What is the color of the precipitate formed from barium sulfate?
White
View source
What is the first step in identifying halide ions?
Add dilute
nitric acid
dropwise
View source
What is added after nitric acid to test for halide ions?
Silver nitrate solution (
AgNO3
)
View source
What color precipitate indicates the presence of chloride ions?
White (
AgCl
)
View source
What color precipitate indicates the presence of bromide ions?
Cream (
AgBr
)
View source
What color precipitate indicates the presence of iodide ions?
Yellow (
AgI
)
View source
How can you distinguish between silver halides using ammonia solutions?
By observing solubility in dilute and concentrated
NH3
View source
Which silver halide is soluble in dilute ammonia?
Silver chloride (
AgCl
)
View source
Which silver halide is soluble in concentrated ammonia?
Silver bromide (
AgBr
)
View source
Which silver halide is not soluble in either dilute or concentrated ammonia?
Silver iodide (
AgI
)
View source
Why is it important to eliminate interfering ions in tests?
To avoid
false positives
in
negative ion tests
View source
How do carbonate ions interfere with sulfate tests?
They precipitate as white
barium carbonate
View source
How do sulfate ions interfere with halide tests?
They precipitate as white
silver sulfate
View source
What can introduce additional chloride ions leading to false positives?
Hydrochloric acid
View source
What is the correct order for testing negative ions?
Carbonate
, sulfate,
halides
View source