Oh

Figure 4.14 The effect of ionic strength, ¡u, on the hydrolytic rate constant, k, for phentolamine hydrochloride in buffer solutions of pH 3.1 and 7.2 at 90°C.

EXAMPLE 4.7 Calculation using the Bransted-Bjerrum equation

The following values of the rate constant, k, were obtained at 60°C for the hydrolysis of penicillin in phosphate buffer at pH 8.8 in a series of solutions of varying ionic strength, p:

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