Title:Show that the decomposition of hydrogen peroxide is a first order reaction

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Experiment 9
Title Show that the decomposition of hydrogen
peroxide is a first order reaction Objectives Sho
w that the decomposition of hydrogen peroxide is
a first order reaction Theory If H2O2 ? H2O ½
O2 is first order then rate kH2O2
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Procedures

• Dilute 10.0 cm3 of 0.1 M KMnO4(aq) into 250 cm3
  in volumetric flask.
• Introduce 150 cm3 of deionized water, 10 cm3
  6vol. H2O2, 50 cm3 of borate buffer and 10 cm3 of
  dil. KMnO4(aq).
• Pipette 10.0 cm3 sample and run it into conical
  flask containing 10 cm3 dil. H2SO4(aq). Start
  the clock.
• Titrate the 10.0 cm3 sample with KMnO4(aq).
• Withdraw further samples after 5 mins., 10 mins.,
  15 mins., 20 mins., 25 mins. And 30 mins.

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• Vt against t
• Vo Vt against t
• Log(Vo/Vt) against t

t time taken Vo initial vol. of MnO4- used
for titration Vt vol. of MnO4- used for
titration at time t