Investigation exploring rates of reaction, using the reaction between sodium thiosulphate and hydrochloric acid as a model.

... Investigation exploring rates of reaction, using the reaction between sodium thiosulphate and hydrochloric acid as a model Aim To investigate the factors affecting rates of reaction, to gain an understanding of the science involved with changing the rate of a reaction. Research What is meant by 'rate of reaction'? It is the rate of disappearance of a reactant or the rate of appearance of a product. In a previous investigation, the rate of reaction of calcium carbonate and hydrochloric acid was measured by recording the rate of appearance of carbon dioxide. It is obvious that reactions happen at different rates. For example, Iron + oxygen --> iron oxide ...takes place extremely slowly, especially if the iron is dry. Meanwhile, silver nitrate + hydrochloric acid --> silver chloride + nitric acid ...takes place instantaneously. Why are rates of reaction important? The rate of a reaction matters to manufacturers. In industry, a slow reaction means slow production, and this often means less

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