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Group 7 2.3 - Coggle Diagram
Group 7 2.3
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Appearance of Halogens
Cl2 - Pale Green - Gas (@ room temp),- Pale green (polar and non polar solvents)
Br2 - Red/Brown - liquid (@ room temp) - orange (polar & non polar solvent)
I2 - Black - Solid (@ room temp) - Brown (Polar Solvent) Pink/Purple (Non Polar Solvent)
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Test for Halide ions
Make Solution of substance to be tested and add silver nitrate (wont work for F- ions as AgF soluble in water)
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Ability of Halogens to act as oxidising agents decreases down a group - more shells more shielding - nuclear attraction to the e- being gained decreases therefore ability to act as oxidising agent decreases