Group 7 Halogens

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1

Slide 1

Group 7 – The Halogens

Slide 2

Properties of the Halogens

Colour

Green

Orange

Grey/black

State

Gas

Liquid

Solid

Yellow

Black

Solid

Gas

Slide 3

Uses of the Halogens

Fluorine

Iodine

Bromine

Chlorine

Toothpaste

Water treatment

Extraction of Aluminium

Non stick coatings

Enrichment of Uranium

Water disinfection

Hydrochloric acid

Plastics

Bleaches

Photographic film

Tear gas

Flame retardants

Pharmaceuticals

Disinfectant

Halogen lamps

X ray diagnosis

Salt additive

Thyroid treatment

Cancer treatment

Slide 4

Reactions of the Halogens

All of the halogens will react with Alkali metals to produce ionic compounds

Lithium Bromide

Potassium Iodide

Follow the pattern to write the balanced chemical equations

Slide 5

Reactions of the Halogens (2)

All of the halogens will react with Hydrogen to produce gasas

Hydrogen Bromide

Hydrogen Iodide

Follow the pattern to write the balanced chemical equations

Slide 6

Reactions of the Halogens (3)

All of the halogens will react with water to produce 2 acids

This also happens with Bromine and Iodine and the acids formed are much stronger!