Chemistry Rates Of Reaction Marble chips and Hydrochloric acid

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Name: George Edwards                

Year 11 Chemistry

Rates of Reaction Coursework

Planning

How does changing the concentration of a substance effect the rate of reaction?

Planning:

This science coursework is an experiment, it will explore the rates of reactions, factors affecting the results and highlighting and explaining possible conclusions for any anomolies. It involves measuring and recording results in experiments that we have done in lessons, and then analysing the results in this coursework. The experiment is fairly simple but I will state the method and equipment we used to complete the exercise below. To ensure the test is fair, we must ensure the variables are kept the same throughout all the experiments. To ensure the test is as impartial as practicallity allows, I will ensure the temperature, acid concentration, surface area and timeing are all constant. This will ensure my results are as accurate as I can achieve.

The experiment involves using hydrochloric acid (acidic) and marble chip (alkali). We are going to put both reactants into a chonical flask and collect the gas that will be given off. This will allow us to see which reaction is faster with different strenghts of hydrochloric acid, and also lets us compare results and draw realistic conclusions whilst we are doing each one.

Throughout the experiment we used a wide varaiety of equipmemt. All the equipment I used to complete the assignment is listed, accompianed with reasons why we used it - displayed below

Equipment/ Reason Table:

Now I have explained the equipment I used, I will explain in depth the method which I followed. I followed the below method exactly, everytime to minimise any problems and keep things contsant. It is useful having an indepth guide to follow as it will ensure I do not do things differently from one to the other.

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Method of Experiment:

  • Before I began the experiment I would source all the equipment (above) this would stop me from rushing around later. I would draw my evidence table (below). Once I had everything I could actually began setting up and completing the experiment.
  • Assuming all the equipment is preseant, I would measure the acid (20/30ml) then pour into a chonical flask.
  • I would then put the marble chip inside the flask and quickly put the bung on. The bung connects the delivery tube and gas syringe and ensures no gas would be lost.
  • Record ...

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