Chemistry Report: Experiment on Rates of Reaction

Rates of Reaction

CaCO3 + 2HCl → CaCl2 + H2O + CO2

In this report I will be suggesting my predictions on what the rates of reaction will be and what the actual rates of reaction are. I will do this by collecting data from experiments and I will show this by putting data into a table.

The main aim of my experiment is to find the rate of reaction over time taken and the rate of reaction when the concentration of hydrochloric acid increases or decreases. I will try to make my experiment as accurate as I can. I will carry out three trials to make my test fair. I will also use the correct equipment for accurate results.

Also, I will be using three different variables to use in my report; The Independent Variable, Dependant Variable and the Control Variable.

The independent variable will be the amount of water and Hydrochloric Acid I use because that is what changes through the experiment.

The dependant variable will be about measuring the time it takes for the marble powder to react with different concentrations of HCl.

The control variable will be the amount of marble powder I use in each mixture and this will be the same amount in every experiment because this is what will have to be the same all the way through my experiment to get my results how I want and to measure the rates of reaction correctly.

Changes in the Rate of Reaction

Below is a list of variables that could affect the rates of reaction:

• Temperature – when the temperature is increased, the rate of reaction is quicker. This is because the particles have more energy to move around and to collide with each other. Therefore, I think the more collisions between particles there are, the faster the rate of reaction is.

• Concentration – by adding m...

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...itable because I had tested it before I did the real thing. This got my confidence up and I was ready to do the real experiment with the same method.

Last but not least, I could have used a different variable to get further evidence such as temperature. This would get more evidence because I could have investigated if temperature makes any difference to the rate of reaction – which I think it does.

Finally, I think I am confident in my conclusion because by looking at my graphs you can easily tell that the higher the concentration, the quicker the rate of reaction…

To round off everything, once again I think I could improve my experiment by repeating the experiment many times to make sure the results are more accurate, reliable and valid. I could have used better and reliable equipment and measure the concentration of HCl, calcium carbonate and water accurately.