questions 7, 8, and 9 refers to the Remember Vi Use the H202 decomposition exper

Question

questions 7, 8, and 9 refers to the Remember Vi Use the H202 decomposition experiment Rate k[H2021"[] table below to answer the following questions. Rate (ml mL of 0.090 M H2O2 mL of H20 mL of 0.15 M O2/sec) KI 20 mL/sec 30 mL 10 mL/sec 20 mL 20 mL/sec Trial 20 mL 20 mL 10 ml Tria 10 mL 10 mL Trial 20 ml 10 mL 7 For trial 1 the initial cortcentration of KI (after everything is added) is closest to: A 0.15M B0.015M C 0.3M D0.03M E 0.5M FO.05M G 0.005 8 Based on Trial 1, 2, and 3, the values for n and m In the expression Rate = k[H2O2)"[I]m are: 9 Based on the rate expression and the values n and m, what would be the 02 generation rate (in units of mt O2/sec) for the concentrations below? Vol. 0.15 M KI Vol. 0.090 M H202 Vol. H20 Rate (mL O2/sec) Trial 420 mL 20 mL 10 mL A 10 B 20 ? 30 D 40 E 50 F 60 G 70 ??? mL/sec

Explanation / Answer

From trail 1 and 2, when conc of H2O2 is halved then rate is also halved.

From trail 2 and 3, when conc of KI is doubled then rate is doubled too.

when both are become doubled from trail 1 then rate become 4 times increase.

hence rate is 40mL/sec.

Vol.0.15M KI Vol.0.090M H2O2 Vol.H2O Rate(mL O2/sec) TRAIL 1 10 20 20 20 TRAIL 2 10 10 30 10 TRAIL 3 20 10 20 20 TRAIL 4 20 20 10 40

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