Tests
Tests for positive ions
- Created by: Emily Shaw
- Created on: 11-05-11 20:40
Flame Tests
What colour does lithuim give in a flame test?
Bright Red
Flame Tests
What colour does sodium give in a flame test?
Golden yellow
Flame Tests
What colour does potassium give in a flame test?
Lilac
Flame Tests
What colour does calcium give in a flame test?
Brick red
Flame Tests
What colour does barium give in a flame test?
Green
Positive Ions
What is the test for Aluminium Ions?
Add sodium hydroxide and a white precipitate is formed. Aluminium hydroxide dissolves when excess sodium hydroxide is added
Positive Ions
What is the test for calcium ions?
Add sodium hydroxide and a white precipitate is formed
Positive Ions
What is the test for magnesium ions?
Add sodium hydroxide and a white precipitate is formed
Positive Ions
What is the test for copper (II)?
Add sodium hydroxide and copper (II) hydroxide precipitate is blue
Positive Ions
What is the test for iron (II)
Add sodium hydroxide and Iron (II) hydroxide precipitate is green and slowly turns brown
Positive Ions
What is the test for Iron (III)?
Add sodium hydroxide and iron (III) hydroxide precipitate is reddish brown
Positive Ions
What is the test for Ammonium ions?
Ammonium ions react with sodium hydroxide to form ammonia, if the solution is heated the gas given off turns red litmus blue
Test for Negative Ions
What is the test for carbonate ions?
Add dilute hydrochloric acid and the gas given off will turn limewater milky
Test for Negative Ions
What is the test for halide ions?
Add dilute nitric acid then silver nitrate solution.
Bromide Ions- Cream precipitate
Chloride ions- White precipitate
Iodide Ions- Yellow precipitate
Test for Negative Ions
What is the test for sulfate ions?
Add dilute hydrochloric acid, then barium chloride solution. Gives white precipitate
Test for Negative Ions
What is the test for nitrate ions?
Add aluminium powder then sodium hydroxide solution. Warm gently and gas will turn red litmus blue, shows ammonia was produced and nitrate ions were present
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