Question

2. Kinetics of an Oscillating Reaction Oscillating reactions are a special kind of chemical reactions and are characterized by an elementary reaction in which at least one of the reactant is also a product. An example of a series of elementary reactions of an oscilating reaction is below: ka (a) Identify the autocatalytic reacton i.e, a reaction in which the products and reactants share atleast one common ingredient) (b) Identify the reactants, intermediates, and products for the overall reaction described by the above ele- mentary reactions. Hint: To identify the reactants and produts, combie al the reactions and write out a balanced overall reaction. This should let you identify the reactants and the products. Then you can identify the intermediates that cancel and do not show up in the overall balanced reaction (c) Write the rate equation for specio (d) Suppose that in the early stages of the reaction, [Y] is large. Solve for [X using this assumption and the s X. steady state approximation. (e) As time proceeds, you could imagine that Y gets depleted, and therefore the large Y approximation is no longer valid. (Equivalently, you now need to use the small [Y] approximation.) Solve for [X using this new assumption and the steady state approximation Notice that the two expressions for [X] at different concentration limits of Y] are quite different. At some later time when Y is replenished, the cycle will repeat, which explains the naming of oscillating (or cyclic) chemical reactions

Answer 1

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