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Our assignment was to produce a piece of coursework investigating the rates of reaction, and the effect different changes have on them.

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Introduction

Our assignment was to produce a piece of coursework investigating the rates of reaction, and the effect different changes have on them. The rate of reaction is the speed of a chemical reactions, usually used in terms of the concentrations of reactant consumed in a given time. What could affect the rate of a reaction * Temperature * Concentration (of solution) * Surface are (of solid reactants), * And Catalyst I have chosen to investigate the effect the concentration will have on the rate of reaction. This is because it is the easiest and the most practical to investigate - *it would take longer to prepare a solid in powdered and unpowdered form, *it is difficult to get accurate readings due to the probability of human errors, *the use of a catalyst complicates things, and if used incorrectly could affect the end results. ...read more.

Middle

This means that both graphs drawn up in my analysis will have positive correlation, and will probably be curved as the increase in rate of reaction will not be exactly the same as the concentration is increased. The reason I predict this is because if the concentration of a solution is increased there are more reactant particles. This increases the probability of reactant particles colliding with each other. Apparatus * Beaker *Glass rod *Conical Flask *100cm( Cylinder *10cm( Cylinder *Stop Watch *Balance * X marked paper Method: -. First we measured the amount of crystals that we wanted Then we added the crystals to the beaker. After that we added the 100cm( of water to the beaker. ...read more.

Conclusion

We decided that the concentrations were going to range from 10g/unit - 60g/unit the reason for this is because anything lower than 10g/unit would take to long and anything higher than 60g/unit would be to fast and could be affected majourly by the reaction time of the person on the stopwatch. End Results To work out the rate of reaction you divide 1 by the time taken for the reaction to take place. Analysis In this experiment I have found out that the lower the concentration the lower the rate of reaction is. I know this because my graph has a positive correlation and is almost a straight line, with a few out layers which could be due to human error during the experiment. However using a line of best fit we can figure out what the rate of reaction should be. ?? ?? ?? ?? ...read more.

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