Nikita Bansal
BD Somani International School
Chemistry Laboratory Report
To Study the Factors Affecting the Rate of Reaction
Design
Nikita Bansal
B.D.Somani International School
Chemistry Standard Level
Candidate Number- 002602015
Session: May 2010
AIM
To study the factors affecting the rate of reaction
RESEARCH QUESTION
What is the effect of changing the concentration of sodium thiosulphate by 5cm3 upon the rate of reaction in the reaction between sodium thiosulphate and hydrochloric acid keeping volume of acid, temperature, number of stirs, pressure and surface area constant?
BACKGROUND INFORMATION
The rate of reaction is often judged by the Collision Theory. This theory created by Max Trautz and William Lewis qualitatively explains how chemical reactions occur and why reaction rates differ for different reactions. This theory is based on the idea that the reactants must collide in order for any reaction to take place. Increasing the concentration of reactants causes an increase in the frequency of collisions, thus increasing the rate of reaction. Although you keep the temperature constant, kinetic theory is relevant. This is because the molecules in the reaction mixture have a range of energy levels. When collisions occur, they do not always result in a reaction. If the two colliding molecules have sufficient energy they will react.
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