For the reaction H2O2(aq) + 2H+ + 2I-(aq) -> 2H2O + I2(aq) Rate = [ H2O2] [I-] Two different mechanisms have been proposed choose which is most accurate give reasons why Slow fast H2O2 + I- à H2O + IO- H2O2 + I- à H2O + IO- Fast slow H+ + IO à + HIO H+ + IO- à HIO Fast fast HIO + H+ + I- à I2 + H2O HIO + H+ I à I2 + H2O
For the reaction
H2O2(aq) + 2H+ + 2I-(aq) -> 2H2O + I2(aq)
Rate = [ H2O2] [I-]
Two different mechanisms have been proposed choose which is most accurate give reasons why
Slow fast
H2O2 + I- à H2O + IO- H2O2 + I- à H2O + IO-
Fast slow
H+ + IO à + HIO H+ + IO- à HIO
Fast fast
HIO + H+ + I- à I2 + H2O HIO + H+ I à I2 + H2O
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