化学反应速率常数的探讨

对于化学反应速率常数ｋ的概念，已有明确的共识。然而对于速率常数的单位（量纲），一些文献中没有提及，也有一些文献提出“速率常数单位随反应级数改变”．本文提出，速率方程式中的浓度项由浓度改用相对浓度表示，使ｋ的量纲与反应速率相同，从而使ｋ的意义简明、准确，概念易于接受，有利于科研和教学。

On the Rate Constant in Chemical Reaction

The concept of rate constant k in the chemical reaction is commonly known. Howeverthe unit of rate constant is not mentioned in some relevant book.Some books show that it varieswith the change of the reaction order. This article points out that the concentration term in therate equation is shown by relative concentration instead of concentration to make the unit of kconsistent with the unit of reaction rate.Thus the meaning of k is brief,clear, accurate and easilyaccepted.It is benefit to the teaching and scientific research.