Concentration On The Rate Of A Chemical Reaction

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The Effect of Surface Area and Concentration on the Rate of a Chemical Reaction Aim: The aim of this experiment is to determine the effect of surface area and concentration on the rate of a chemical reaction. Introduction: A chemical reaction is a process that involves changes to the molecular or ionic structure of substances. The rate of a reaction is how fast or slow the reaction occurs, in terms of products formed per second or reactants used per second. Some reactions, such as rust, take a long time to occur, whereas other reactions, such as burning, occur at a very fast rate. Reaction rate can be measured by any timer. In experiments where the reaction occurs very quickly, extremely precise instruments are used. However, in this experiment, the colour of the solution will change once the reaction has occurred, thus we can time how long it takes for it to change colour to gauge how long the reaction has taken. The factors that can change the rate of reaction are: temperature, concentration, pressure, presence of catalysts, and surface area. Temperature affects rate of reaction, as heat means that the particles in the substances move more, with higher energy, and thus bump into, and react with, the other substance at a faster rate. Concentration changes reaction rate by having more of the substance so that there is a greater chance that the atoms will collide and react. Pressure impacts reaction rate by forcing the atoms closer together, that is, into a higher density, thus the atoms collide more often. Catalysts speed up the reaction rate by creating ideal conditions for the reaction to occur. Finally, surface area increases reaction rate by increasing the amount of the substance in contact with the reactant. In 1864, Cato Max... ... middle of paper ... ...lour of the solution, so as to create more detailed and reliable results. Another extension would be to conduct a more detailed experiment, by using more different surface areas (eighths, sixteenths, etc) and more different concentrations (8 drops, 10 drops, etc). Conclusion: The aim of this experiment was to determine the effect of surface area and concentration on the rate of a chemical reaction. The hypothesis was that as the surface area and/or concentration of the reactant increase, so will the rate of the chemical reaction. The results gained from this experiment have supported both the aim and hypothesis, showing that when surface area or concentration increase, so indeed does the rate of the chemical reaction. Recommendation: From the data gathered from the experiment, it is clear that increasing surface area and concentration increase the rate of reaction.
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