What Affects The Rate Of A Chemical Reaction
Camila Farah
Catalyst alters the rate of a chemical reaction.
Factors that influence the reaction rates of chemical reactions include the concentration of reactants temperature the physical state of reactants and their dispersion the solvent and the presence of a catalyst. Concentration or pressure of reactants. Whether colliding molecules react depends on their orientation. To gain an understanding of the four main factors that affect reaction rate.
The surface area of reactants affects the rate of reaction. How temperature affects chemical reaction rate increasing the temperature causes molecules to move faster so there s an increased chance of them colliding with each other and reacting. In other words the rate of enzyme controlled reaction is double for every rise of 10 c. The main factors that can influence the rate of a chemical reaction are.
Rate of reaction formula. Catalyst is specific in its action. Effect of concentration on rate of chemical reactions. Factors that affect reaction rates.
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Reaction kinetics is the study of the rate of chemical reactions and reaction rates can vary greatly over a large range of time scales. Surface area of reactants. Aside from catalysts other chemical species can affect a reaction. The amount of products remains the same with or without the catalyst.
If the size of a particle is small the surface area will be more and this increases the speed of heterogeneous chemical reactions. An increase in the concentration of one or more of the reactants will increase the rate of reaction. A a b b p p q q. How does temperature affect the rate of reaction.
The effect of temperature on rate of reaction is to speed it up mainly by increasing the number of particles that achieve enough energy to cross the activation energy threshold. Ph at which the rate of enzyme controlled reaction is maximum is known as optimum ph which is different for different enzymes. Positive catalyst increases the rate of reaction. From collision theory for rate of chemical reactions we know that there are a few factors which affect the rate of a reaction.
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Under constant other factor ph affects the rate of reactions.
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