Halogens Flashcards
1
Q
Reactivity decreases down group 7
A
As atomic radius increases
Electron shielding increases
Ability to gain an electron decreases
Weaker nuclear attraction
2
Q
Benefits, risks and ethics of adding chlorine to water
A
Kills bacteria
It is toxic + formation of chlorinated hydrocarbons
People’s right to choose. Consideration of other methods of purifying drinking water
3
Q
Halogen displacement reactions
A
A more reactive halogen will displace a less reactive halogen
4
Q
Disproportionation
A
Reaction where the same element is both oxidised and reduced
5
Q
Test for halide ions
A
Identified by their reaction with acidified silver nitrate solution to form silver halide precipitates
Forms a white precipitate
