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Rates of Reaction The rate of a reaction can be defined as the speed at which a reactant is lost, and/or the speed at which a product is formed in a chemical reaction. All chemical reactions happen at different rates. Explosions are extremely fast, whereas rusting is extremely slow. There are five factors that affect the rate of a reaction. These are: * Temperature * Surface Area/Particle Size * Pressure * Concentration * Catalysts In our everyday lives, we usually want to slow reactions down, rather than speed them up. For example, we store food in fridges or freezers to slow any reactions down which would otherwise make the food rot. Aging is a process that many people want to slow down. Scientists have blamed the appearance of wrinkles on free radicals in the skin. They have also found out that using antioxidant creams helps slow the aging of skin down. Some paints contain antioxidants,...

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