The reaction,
A + 2 B ? 2 D, has been determined to take place in two steps:
A ? 2 X , X + B ? D
The rate expression has been found experimentally to be
rA = k C A1/2 C B
Use both the “pseudo-equilibrium hypothesis” and the “pseudo-steady-state assumption” to derive a rate expression. Do both rate expressions agree with the experimental?