When monitoring the reaction between calcium carbonate and hydrochloric acid by mass loss, a cotton wool plug is placed in the neck of the flask to prevent the escape of carbon dioxide gas.

In the acid-catalysed iodination of propanone, the reaction can be continuously monitored using a colorimeter because the concentration of the coloured iodine reactant decreases over time.

The alkaline hydrolysis of ethyl ethanoate can be continuously monitored by colorimetry because the ester reactant has a high molar absorbance in the visible light spectrum.

In a quench-and-titrate method, a reaction mixture aliquot can be quenched by diluting it with ice-cold water, which stops the reaction by increasing its activation energy.