Final answer:
Chemical reaction rates are influenced by concentration of reactants, temperature, presence of a catalyst, surface area contact and the state of subdivision of the reactants.
Step-by-step explanation:
The rate of a chemical reaction can be influenced by several factors. Firstly, the concentration of the reactants: a higher concentration is likely to increase the rate of the reaction. Secondly, the temperature: reactions generally happen faster at higher temperatures, sometimes doubling in speed with an increase of 10 °C. Next is the presence of a catalyst, which can accelerate a reaction by creating a pathway with a lower activation energy. Fourthly, reactions involving two phases can proceed more rapidly when there is greater surface area contact. Lastly, the state of subdivision of the reactants plays a role, smaller particles react faster due to more reactive surface available.
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