Qualitative Tests

  • Created by: jodi
  • Created on: 08-01-19 15:50
White crystalline powder
Does not contain transistion metal ions; not a transition metal compound. Could be a group 1, 2 or ammonium compound
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Blue crystalline powder
May contain copper (II) ions; copper (II) compound.
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How do you test for solubility in water?
Add a few spatula measures of solid to a test tube of deionised water and shake to mix.
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If solid dissolves to form a colourless solution then?
The solid is soluble in water. May be a group 1,2, aluminium, zinc or ammonium compound
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If solid dissolves to form a blue solution?
Copper ions may be present
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How do you carry out a flame test?
Dip a nichrome wire in concentrated hydrochloric acid; touch the sample with the wire; then hold it in a blue bunsen flame.
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Crimson flame
Lithium ion
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Yellow/Orange flame
Sodium ion
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Lilac (pink through cobalt blue glass) flame
Potassium ion
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Brick red/red flame
Calcium ion
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Green/apple green flame
Barium ion
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Blue-green/Green-blue flame
Copper (II) ion
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How do you test for halide ions using silver nitrate solution?
Dissolve a spatula of the solid sample in dilute nitric acid and add a few cm of silver nitate solution; Add dilute/concentrated ammonia solution
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How do you know if a chloride ion is present? (Halide experiment)
A white precipitate will appear which is both soluble in dilute and concentrated ammonia solution to form a colourless solution
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How do you know if a bromide ion is present? (Halide experiment)
A cream precipitate appears which is not soluble in dilute ammonia solution but is soluble in concentrated ammonia solution to form a colourless solution.
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What is the name of the precipitate in the reaction between chloride ions and ammonia solution?
AgCl
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How do you know if an Iodide ion is present? (Halide experiment)
A yellow precipitate appears which is not soluble in either dilute or concentrated ammonia solution.
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How do you test for sulphate ions using barium chloride solution?
Dissolve a spatula measure of the solid sample in dilute nitric acid (or hydrochloric acid) and add a few cm of barium chloride solution.
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How do you know if sulfate ions are present?
If a white precipitate forms
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What is the name of the white precipitate formed in the reaction between sulphate ions and barium chloride solution?
BaSO
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How do you test for carbonate ions using dilute acid?
Place a few cm of dilute acid in a test tube and add a spatula measure of the solid sample.
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Other cards in this set

Card 2

Front

May contain copper (II) ions; copper (II) compound.

Back

Blue crystalline powder

Card 3

Front

Add a few spatula measures of solid to a test tube of deionised water and shake to mix.

Back

Preview of the back of card 3

Card 4

Front

The solid is soluble in water. May be a group 1,2, aluminium, zinc or ammonium compound

Back

Preview of the back of card 4

Card 5

Front

Copper ions may be present

Back

Preview of the back of card 5
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