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Nick Martin Set 1 Science 12/01/02 How does the temperature Affect the rate of reaction For the chemicals hydrochloric acid And sodium thiosulphate. Aim The experiment will involve me adding a fixed amount of hydrochloric acid and sodium thiosulphate together and by seeing when it goes cloudy investigate how long it takes for them both to react when they are at different temperatures. Research A reaction rate is measured in two ways: either the quantity of the product made or the time it takes for the substances to react. Rate of reaction differs from chemical to chemical; for example the chemical reaction I am studying will last an average of thirty-two seconds at room temperature. However many other reactions like rusting will happen over a longer period of time. There are seven main factors affecting the rate of a reaction: * Concentration, * Pressure, * A catalyst, * Surface area, * Particle size, * Light, * Finally, temperature is the one I...

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