Rate laws, reaction order, catalysts, and activation energy concepts tested on the MCAT.
35 cards · basic cards · AI-written, checked twice. Edit anything.
- What is reaction rate in chemical kinetics?
- The change in reactant or product concentration per unit time
- What is the general form of a rate law for a reaction with reactants A and B?
- rate = k[A]^m[B]^n
- What does the exponent on a reactant's concentration in a rate law represent?
- The reaction order with respect to that reactant
- How is the overall order of a reaction determined from its rate law?
- It is the sum of all the individual reactant exponents (orders)
- Can reaction order be determined from the balanced chemical equation alone?
- No, reaction order must be determined experimentally, not from stoichiometric coefficients
- What is the rate law for a zero-order reaction?
- rate = k
- What are the units of the rate constant k for a zero-order reaction?
- M/s (molarity per second)
- What is the rate law for a first-order reaction?
- rate = k[A]
- What are the units of the rate constant k for a first-order reaction?
- 1/s (inverse seconds)
- What is the rate law for a second-order reaction with a single reactant?
- rate = k[A]^2
- What are the units of the rate constant k for a second-order reaction?
- 1/(M*s) (inverse molarity times inverse seconds)
- What is the integrated rate law for a zero-order reaction?
- [A] = [A]0 - kt
- What is the integrated rate law for a first-order reaction?
- ln[A] = ln[A]0 - kt
- What is the integrated rate law for a second-order reaction?
- 1/[A] = 1/[A]0 + kt
- What is the half-life formula for a zero-order reaction?
- t(1/2) = [A]0 / (2k)