8C.2 Flashcards
what is product of a Group 1 and 2 reaction with a halide
usually ionic slats that are white
what are the redox reactions of chlorine
- reactions with group 1 and 2 metals
- halogen displacement reactions
- chlorine with water
- chlorine with cold/hot alkali
- reactions of F and As
halogen displacement reactions occur in
aqueous solutions
what is the problem with interpreting the colour change in halide displacement reactions
- the colours can be very similar
2. and the colours vary at different concentration
how can we solve the problem of interpreting colour in halide displacement reactions
by adding an organic solvent (cyclohexane) into the reaction and then shacking the tube and this works since halogens are more soluble in cyclohexane
what is the chemical reaction of water with chlorine
Cl2 + H20 ——> HCl + HClO
what is the name of the products in the reaction between water and Cl
Hydrochloric acid and chloric (I) acid (hypochlorous acid)
is there a colour change in the water and Cl reaction
no there is no colour change since all 3 are colorless
why do we add Cl to water
to disnfect it from pathagones
what is the reaction between Cl and cold alkali
Cl2 + 2NaOH ——> NaCl + NaClO + H2O
what are the names of the salts formed in CL and cold alkali reactions
sodium chloride salt and sodium chlorate(I) (sodium hypochlorite)
what is Sodium chlorate(I) used in
disinfection of water but mainly in household bleach
what is the reaction between Cl and hot alkali
3Cl2 + 6NaOH ——-> 5NaCl + NaClO3 + 3H2O
Br and iodine react similarly
what are the products of the reaction between Cl + Hot alkali
Sodium chloride and sodium chlorate (V)
what is sodium chlorate (V) used for
bleach and also weed killer
