3. Consider the following mechanism: Step 1: H2O2 + I-→ H2O + IO-(slow) Step 2: H2O2 + IO-→ H2O + O2 + I-(fast) a) Give the equation for the overall reaction. 2 H2O2 2 H2O + O2 → b) What acts as a in this mechanism? I- catalyst c) What acts as an in this mechanism? IO- intermediate 4. What is by the in a reaction mechanism? rate determining step Slowest elementary step, determines the rate of the overall reaction 5. What is meant by a reaction mechanism? A series of reactions / steps by which a reaction with a molecularity greater than 2 can occur by to ensure that effective collisions can occur 6. How are Reaction Mechanisms determines? experimentally 7. Given the following Potential Energy Diagram for a 3 step reaction, answer the questions below it: Which arrow indicates the for the step of the reverse reaction? 5 activation energy first b) Which arrow indicates the for the step of the forward reaction? 1 activation energy first c) Which arrow indicates the for the step of the forward reaction? 2 activation energy second
3. Consider the following mechanism: Step 1: H2O2 + I-→ H2O + IO-(slow) Step 2: H2O2 + IO-→ H2O + O2 + I-(fast) a) Give the equation for the overall reaction. 2 H2O2 → 2 H2O + O2 b) What acts as a catalyst in this mechanism? I- c) What acts as an intermediate in this mechanism? IO- 4. What is by the rate determining step in a reaction mechanism? Slowest elementary step, determines the rate of the overall reaction 5. What is meant by a reaction mechanism? A series of reactions / steps by which a reaction with a molecularity greater than 2 can occur by to ensure that effective collisions can occur 6. How are Reaction Mechanisms determines? experimentally 7. Given the following Potential Energy Diagram for a 3 step reaction, answer the questions below it: Which arrow indicates the activation energy for the first step of the reverse reaction? 5 b) Which arrow indicates the activation energy for the first step of the forward reaction? 1 c) Which arrow indicates the activation energy for the second step of the forward reaction? 2
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