National 5; Rates of reaction Calculating the rate of a reaction. The speed of a chemical reaction is affected by temperature, concentration, particle size and the presence of a catalyst.

The amount of foam produced in a period of time is a way of measuring the rate of the reaction. Project the video Genie in a Bottle. Genie in a Bottle. Lesson 6.5 Video. ... Explain to students that ...

Students saw that the rate of the reaction can be sped up if the reactants are warmed and slowed down if the reactants are cooled. Explain that there are many reactions that will not occur at all at ...

The activity of enzymes—a measure of how much they speed up a reaction—is commonly described mathematically by considering three rates: the rate at which the substrate molecules bind to the enzyme; ..