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An investigation into rates of reaction - Theory

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Introduction

Chemistry Coursework Title: An investigation into rates of reaction Aim: A study of the effect of changing the concentration of a solution on the rate of reaction. Prediction: The effect of changing the concentration of a solution, on the rate of a reaction. A concentrated solution can be made of dissolving a large amount of solute in a small amount of solvent. A dilute solution can be made by dissolving a little solute in a large amount of solvent. A concentrated solution A dilute solution Table of results: Expt No Total Volume Concentration of sodium thiosulphate Volume of dilute hydrochloric acid Time 1st attempt (s) ...read more.

Middle

Chemical reactions occur when particles collide with enough energy to form new substances. The rate of reactions can be increased by increasing the temperature or concentration. For solids the rate of reaction can be increased by increased the surface area. The rate of reaction can be found measuring the volume or mass of gas at intervals over a period of time. Kinetic Theory The Kinetic Theory tells us that there are three states of matter, which are solid, liquid and gas. All matter is made up of ting particles that are constantly moving. ...read more.

Conclusion

other. Collision Theory The collision Theory tells us that in a reaction between two reactants, A + B forming products C + D. A + B C +D (Reactants) (Products) Their particles must collide. Some collisions will be successful energy in the collision to break existing bonds before new bonds can be formed, if a collision is to be successful and result in products. This minimum amount of energy need for this is called Activation energy. If there is no sufficient energy upon collision/ impact, the recant particles will simply bounce off one another resulting in an unsuccessful collision. Subsisting Unsuccessful Collision Successful Collision The energy on impact is less than The energy on impact is greater than the the activation energy. activation energy. ...read more.

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