DN Halide reactions Flashcards
how many reactions with chloride
1
how many reactions with bromide
2
how many reactions with iodide
4
chloride product and observation
HCl - steamy fumes
Bromide product and observation, first reaction
HBr - steamy fumes
bromide product and observation, second reaction
Br2 - brown fumes
SO2 - colourless gas
iodide product and observation, first reaction
HI - steamy fumes
iodide product and observation, second reaction
I2 - purple fumes
SO2 - colourless gas
iodide product and observation, third reaction
S - yellow solid
iodide product and observation, fourth reaction
H2S - bad egg smell
Chloride reaction and type of reaction
NaCl + H2SO4 = NaHSO4 + HCl
acid-base
Bromide reaction and type of reaction, first reaction
NaBr + H2SO4 = NaHSO4 + HBr
acid-base
Bromide reaction and type of reaction, second reaction
H2SO4 + 2HBr = Br2 + SO2 + 2H2O
redox
Iodide reaction and type of reaction, first reaction
NaI + H2SO4 = NaHSO4 + HI
acid-base
Iodide reaction and type of reaction, second reaction
H2SO4 + 2HI = I2 + SO2 + 2H2O
redox
Iodide reaction and type of reaction, third reaction
H2SO4 + 6HI = S + 4H2O + 3I2
Iodide reaction and type of reaction, fourth reaction
H2SO4 + 8HI = H2S + 4H2O + 4I2
strongest reducing power
Iodide
explanation in reducing powers
As you go down the group despite the increase in nuclear charge, the outer electrons are further from the nucleus and there is more shielding so it is lost more easily
halide to halogen half equation
2X- = X2 + 2e-
H2SO4 = SO2
H2SO4 +2H+ 2E- = SO2 =2H2O
H2SO4 = S
H2SO4 + 6H+ + 6e- = S + 4H2O
H2SO4 = H2S
H2SO4 + 8H+ +8e- = H2S + 4H2O