Halogens

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  • Created by: Voltace
  • Created on: 30-05-14 20:11
What are the properties of the halogens? (Trends)
Boiling points increase down group (increasing van der waals size & strength) Electronegativity decreases (atomic radius increases)
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What are the colours of the halogens?
Fluorine = Yellow Chlorine = Green Bromine = Brown Iodine = Grey
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What are the displacement reactions all about?
They're oxidising agents, but get less oxidising down group. Few drops of aqeous halogen to halide ion.
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How does one make this magnificent susbtance we all know as bleach?
Disproportionation reaction, chlorine + dilute NaOH forms NaClO (Sodium chlorate(I))
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What goes on in chlorine & water?
First: Chlorine + Water -> Hydrocholric acid + Hypchlorus acid) (Chlorine is disproportionation) HClO (Cholrus) ionizes further Chlorate Ion + H30+ & Bright Sunlight makes hydrochloric acid + oxygen
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How do you test for halides?
Add to dilute nitric acid to remove unwated ions, add silver nitrate F= No precip, c= white precip br=cream iodine = yellow Add amonia to check for sure
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Does the reducing power do down the group?
Increases (shielding & bigger ions)
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What do halides do when they react with sulfuric acid?
They react to form hydrogen halides, stronger reducers turn the sulfuric acid to water and sulfur dioxide, iodine can reduce the sulfur dioxide to H2S
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Other cards in this set

Card 2

Front

What are the colours of the halogens?

Back

Fluorine = Yellow Chlorine = Green Bromine = Brown Iodine = Grey

Card 3

Front

What are the displacement reactions all about?

Back

Preview of the front of card 3

Card 4

Front

How does one make this magnificent susbtance we all know as bleach?

Back

Preview of the front of card 4

Card 5

Front

What goes on in chlorine & water?

Back

Preview of the front of card 5
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