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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

Physical Chemistry
Physical Chemistry
2nd Edition
ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Ball, David W. (david Warren), BAER, Tomas
Chapter20: Kinetics
Section: Chapter Questions
Problem 20.89E: Label the elementary processes for the reaction between H2 and O2 see section 20.7 as initiation,...
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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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