Explain the effects of reactant concentration and particle size

15.2: The Rate of a Chemical Reaction

explain the effects of reactant concentration and particle size

Factors Affecting Rate of Reaction

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Different chemical reactions occur at different rates or speeds. Some are very slow, like a car rusting, while others are very fast like a sudden explosion. There are four factors that affect the rate of a chemical reaction:. Increasing the temperature a reaction takes place at increases the rate of reaction. At higher temperatures, particles can collide more often and with more energy, which makes the reaction take place more quickly.

Chat or rant, adult content, spam, insulting other members, show more. Harm to minors, violence or threats, harassment or privacy invasion, impersonation or misrepresentation, fraud or phishing, show more. Yahoo Answers. Explain the effects of reactant concentration, temperature, and particle size on the rate of a reaction.? Report Abuse. Are you sure you want to delete this answer? Yes No.

This page describes and explains the way that changing the concentration of a solution affects the rate of a reaction. Be aware that this is an introductory page only. If you are interested in orders of reaction, you will find separate pages dealing with these. You can access these via the rates of reaction menu link at the bottom of the page. For many reactions involving liquids or gases, increasing the concentration of the reactants increases the rate of reaction. In a few cases, increasing the concentration of one of the reactants may have little noticeable effect of the rate.

Thanks for the great notes Tanya, this will make a great presentation! Pages Home Targets Topic 6: Kinetics. Thursday, 28 April 6. Predict and explain, using the collision theory, the qualitative effects of particle size, temperature, concentration and pressure on the rate of a reaction. Factors affecting rate of reaction:.

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Increasing the concentration of reactants generally increases the rate of reaction because more of the reacting molecules or ions are present to form the reaction products. This is especially true when concentrations are low and few molecules or ions are reacting. When concentrations are already high, a limit is often reached where increasing the concentration has little effect on the rate of reaction. When several reactants are involved, increasing the concentration of one of them may not affect the rate of reaction if not enough of the other reactants is available. Overall, concentration is only one factor influencing the rate of reaction, and the relationship is usually not simple or linear. The rate of reaction in general varies directly with changes in the concentration of the reactants. When the concentration of all the reactants increases, more molecules or ions interact to form new compounds, and the rate of reaction increases.



Collision Theory Factors affecting rate Particle size affects rate.

We also know that in a chemical system, these particles are moving around in a random motion. It also explains how it is possible to speed up or slow down reactions that are occurring. The collision theory provides us with the ability to predict what conditions are necessary for a successful reaction to take place.

What is the effect of particle size and surface area on the rate of a reaction involving a solid reactant? How does the changing the particles size changes surface area of a solid affect the speed of a reaction? Why does changing the particle size or surface area change the speed of a reaction? Does stirring the mixture affect the speed of a reaction? The descriptions of experiments to do with The Factors affecting the Rate of Chemical Reactions. Experimental methods for investigating the effect of particle size surface area on the rate of a chemical reaction.

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3 thoughts on “Explain the effects of reactant concentration and particle size

  1. A decrease in particle size causes an increase in the solid's total surface area. concentration of the atoms in order to see how this affects the reaction rate (the.

  2. So, if you increase the concentration, that increases the amount of the reactant thus increasing surface area. Also, if you take a particle and.

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