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Reaction Rate: Reaction rate is simply the rate (usually measured in units/time) that two or more reactants take to complete a chemical reaction. A Brief Introduction to Rates of Reaction Reaction rate can be measured in many different, but effective and accurate ways. Some of these can include measuring: change in heat over time (?H/t), amount of gas produced over time over time (?V/t), the change in concentration over time (?Ph/t) and even change in colour over time (?colour/t). Another way of measuring reaction rate is by timing how long it takes for a reactant to be consumed (disappear), or by timing how long it takes for a new substance to be created (appear). A formula has been derived that is able to calculate the rate of a chemical reaction. This is called the "Rate Equation". The diagram to the right shows the different components that form the rate equation. There...

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