Therefore the molecules are reacting. Concentration increases the number of collisions. If the solution is made more concentrated it means there are more particles of reactant knocking about between the water molecules, which makes collisions between the important particles more likely. In a gas, increasing the pressure has the same effect as it means the molecules are more squashed up together so there are going to be more collisions. If one of the reactants is a solid then breaking it up into smaller pieces will increase its surface area.
I shall be looking at how the Concentration of the solution affects the rate of reaction. Background: Use background knowledge to explain why increasing the concentration will increase the rate of reaction:- include diagrams. Use collision theory. Collision theory: If there is a catalyst added to a substance, it will make the particles have more energy so they start to vibrate and speed up. As they speed up they start to collide.
[IMAGE] 2. Concentration (or pressure) increases the number of collision. If the solution is made more concentrated it means there are more particles of reactants knocking about between the water molecules, which make collisions between the important particles more likely. In a gas, increasing the pressure means the molecules are more squashed up together so there are going to be more collision. [IMAGE] 3.
If a temperature is increased in a reaction the particles will be given more kinetic energy to collide. As a result the rate of reaction will increase because the particles will collide more frequently. How do catalysts effect the rate of reaction? Catalysts are added to chemical reactions to speed them up. Therefore the rate of reaction is faster.
An increase in concentration means there are more particles. More particles means there will be more collisions. 2) Surface Area. Breaking the solid into smaller pieces will increase the surface area exposed to the other reactant. 3) Temperature.
When the temperature increases, the particles consequently heat up. This causes the kinetic energy in them to increase, therefore they move around faster. This means that the rate in which they collide with one another will increase. By increasing the concentration of something, more particles are introduced in the same volume. This would mean that the likelihood of collisions will increase.
The rate of reaction depends on four factors: « Temperature - An increase in temperature produces an increase in rate of reaction. This is because the kinetic energy of particles increases causing them to move faster and result in more collisions. As particles are moving faster, larger proportion of the collisions will exceed the activation energy and so the rate of reaction increases. « Surface Area - If the reactant has a large surface area, there is a greater surface area for collisions to take place resulting in a higher frequency of successful collisions and so causing an increase in the rate of reaction. « Catalyst - A catalyst is a substance, which can alter the rate of a reaction but remains chemically unchanged at the end of the reaction.
Factors/ Variables Catalyst - A catalyst is a substance which increases the speed of a reaction without being changed or used up in a reaction. The catalysis works by giving the reacting particles something to stick to where they can collide into each other; this increases the number of collisions. Concentration - If the solution is made more concentrated it means there are more particles of reactant between the important particles are more likely. Temperature - When the temperature is increased the particles all move quicker, if they are moving quicker, they are going to have more collisions. We used a thermometer to control this.
Temperature – as we increase the temperature, we increase the reaction rate. Raising the temperature makes particles collide more often in a certain time, and makes it more likely that collision results in a reaction. Catalyst - catalyst is a substance, which speed up a chemical reaction. At the end of the reaction the catalyst is chemically unchanged. Aim: Effect of temperature on rate of reaction.
This initial energy is known as the activation energy, and it is needed to break the initial bonds. If one of the reactants is a solid then breaking it up into smaller pieces will increase its surface area. This means the particles around it in the solution will have more area to work on so there will be more useful collisions. If the solution is made more concentrated it means that there are more particles of reactant moving about between the water molecules which makes collisions between the important particles more likely. Because of this I expect the reaction rate to be quicker when the concentration of the acid is higher.