How Does Temperature Affect The Rate Of Reaction

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A chemical reaction is a process that involves the movement of the molecules in a substance. All chemical reactions involve both reactants and products. Reactants are substances that cause a chemical reaction, and products are substances that are generated in the reaction. The reaction rate for a reactant or product in a particular reaction is defined as how quickly or slowly a reaction takes place. In general, the reactions between covalent compounds are slow. For example rusting of iron. In the same way weathering of rocks takes place in millions of years. An example of a fast reaction rate is in an explosion when the reaction has to happen quickly. In general, the reactions between ionic compounds are fast. This reaction is also called neutralisation reaction. Reaction rates can be altered in four ways these are; The temperature is increased, the concentration of a dissolved reactant is increased, the pressure of a reacting gas is increased, solid reactants are broken into smaller pieces and if a catalyst is used or added. In this investigation it was tested if a chemical reaction would occur faster if the surrounding temperature was hotter.

The aim of this experiment was to find out how temperature affects the rate of reaction between Sodium thiosulfate (hypo) and hydrochloric acid.

Hypothesis It is believed that if the temperature is hotter then the reaction rate will occur faster. This is because the heat will make the particles move faster.


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