What colour flame does lithium go when tested in this way?
Crimson red flame.
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What colour does sodium go when tested this way?
Yellow/orange flame.
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What colour does potassium go when tested this way?
Lilac flame.
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What colour does calcium go when tested this way?
Brick red flame.
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What is the other test for metal ions ?
Adding a metal hydroxide and judging the substance by the precipitate formed.
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What's special about metal hydroxide?
Metal hydroxides are insoluble and precipitate out of solution when formed.
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What happens when you add a metal hydroxide to copper(III)Cu2+ ?
This reactions forms a blue precipitate.
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What happens when you add a metal hydroxide to Iron(II)2+ ?
This reactions form a sludgy green precipitate.
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What happens when you add a metal hydroxide to iron(III)Fe3+?
This reaction forms a reddish brown precipitate.
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What's the test for ammonia?
Damp red litmus paper turns blue.
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Why is it important for the litmus is damp?
The litmus paper needs to be damp so the ammonia gas can dissolve and make the colour change.
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If you want to test a substance for ammonium ions(NH4+) what do you add to it?
Add sodium hydroxide to a solution of your mystery substance in a test tube.If there's ammonia given off this means there are ammonium ions in your mystery substance.
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What are cations attracted to and what is it's charge?
Cations are attracted to the cathode and the cathode has a negative charge.
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What are common properties of ionic substances?
Ion ice substances tend to be crystalline solids with high melting points.
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What might ionic substances look like?
Ionic substances may be a gas,a volatile liquid(you might be able to smell it) or a soft solid.
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Other cards in this set
Card 2
Front
What is a cation?
Back
A cation is a positively charged ion.
Card 3
Front
What test do you use for metal ions?
Back
Card 4
Front
What two substances do you need to do this test?
Back
Card 5
Front
What colour flame does lithium go when tested in this way?
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