Another possible extension would be to explore the kinetics of the hydrolysis of acetylsalicylic acid. The rate of the hydrolysis could be calculated by dividing the change in concentration of acetylsalicylic acid by the time values at the initial and final concentrations recorded. Since a buffer solution was used in the experiment, the pH level remained constant, resulting in the hydrolysis of aspirin being a first-order reaction . The rate of hydrolysis can therefore be written as 𝑅𝑎𝑡𝑒 = 𝑘 ,