For a single step reaction A ->B + 2C, the rate law is:
Correct answer: C. Rate = k[A]
- A. Rate=k
- B. Rate = k[A][B]
- C. Rate = k[A]
- D. Rate = k[B]
Explanation
Rate laws or rate equations are mathematical expressions that describe the relationship between the rate of a chemical reaction and the concentration of its reactants. Rate = k[A]x[B]y Where A and B are the reactants raised to power x and y which are their stoichiometric coefficients in the balanced equation and k is the proportionality constant of the reaction.In this particular reaction, only A is on the reactant side and has no power so the rate equation becomes. rate=k[A]. The rest of the options also include products in the rate equation (options B and D) and option A does not include reactant A in the rate equation, hence these are incorrect.
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About Order of Reaction
Reaction order shows how the rate depends on the concentration of each reactant, as expressed in the rate law. Coverage includes zero, first and second-order reactions, integrated rate equations, half-life, units of rate constants and the distinction between overall order and molecularity.
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