rate-determining step


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rate-determining step

The chemical reaction in a series of sequential reactions that takes the longest to occur.
See also: step
References in periodicals archive ?
In the rate-determining step, the flux J is determined by (10), derived from Fick's first law, which assumes that the complex concentration [ST] is almost zero at the interface membrane-receiving phase (dissociation of the complex):
Apparent activation energy [E.sub.a] of the rate-determining step during reduction was determined by applying the Kissinger method.
The activation energy 125.73 kJ/mol (Scheme 1; see (3)) was the highest as the rate-determining step after propanoyl chloride was formed.
This decomposes in a rate-determining step to the products.
The first step of the proposed mechanism was recognized as a rate-determining step and this was confirmed based upon the steady-state approximation.
(4) The double-shell mechanism described C[O.sub.2] absorption process on Na-doped [Li.sub.2]Ti[O.sub.3]; sodium presence changing rate-determining step of the process is the main reason of performance improved.
Addition of neutral salt (sodium perchlorate) has slightly decreasing the rate of the reaction shows that ion and a neutral molecule may be involved in the rate-determining step (Kabilan et al., 1995).

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