Brønsted catalysis equation

The Brønsted catalysis equation or law of correlation, after Johannes Nicolaus Brønsted, gives the relationship between acid strength and catalytic activity in general acid catalysis. log ⁡ k = α ⋅ log ⁡ ( K a ) + C {\displaystyle \log k=\alpha \cdot \log(K_{a})+C} A plot of the common logarithm of the reaction rate constant k versus the logarithm of the ionization constant Ka for a series of acids (for example a group of substituted phenols or carboxylic acids) gives a straight line with slope α and intercept C. The Brønsted equation is a free-energy relationship.

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