To see how fast magnesium reacts in different molarities of Hydrochloric Acid.

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Wajeesha Fernando 11.4

                                           

                                         Rates of Reaction

Aim: - To see how fast magnesium reacts in different molarities of Hydrochloric    

            Acid.

Prediction: - My prediction is that the higher the concentration of the acid, the faster the magnesium strips will dissolve. The higher the concentration means, the more Hydrochloric acid particles for Magnesium particles to react with, increasing the chance of successful collision.

Apparatus: -

                                       

                                                Safe and Fair test

Safe

To ensure that our experiment is safe, one of the first procedures that took place before starting the experiment was to wear goggles. This way our eyes were protected against any HCL acid.

While doing the experiment, we made sure that if we spill any acid on ourselves to wash it away under cold water immediately, to stop getting burned.

We always kept the lid of the HCL acid bottle closed, in case of a spill.

We also kept our ties out of reach of any acid, and had our hair tied back.

Fair

We used the same volume of acid for the first and the second experiments.

We ensured that we used same sizes of Mg strip and the same stop watch for both experiments.

We repeated each concentrated reaction more than once, (twice each in the first experiment and three times in the second experiment).

We put both the acid and water at the same time in the second experiment, and placed the Mg strip afterwards to make certain that the reaction hadn’t started only with the HCL acid or water.

We started the stopwatch just as the Mg strip was put in, to be certain of the time.  

                                           For the first experiment

Method: -

  1. First of all I will gather all my apparatus in to one place.
  2. Then I will place the conical flask on top of a white paper, this will make the image clearer.
  3. I will then use emary paper to take away all impurities from the magnesium strips, and then cut them in to 3cm strips.  
  4. I will then measure the correct amount (10cm3) of HCL with different molarities.
  5. I will fill the conical flask with HCL acid, and get the stop watch ready.
  6. Then I will put the Magnesium strip inside and start the stop watch.
  7. When all signs of Magnesium disappear, I will stop the stopwatch, and record the time on to a table.
  8. I will repeat the same procedure as before again with the same molarity. This id done to determine fair testing.
  9. I will then start another test with a different molarity and repeat the same procedures as stated above. This will be done with all the different, molarities, twice each.  
  10. I will record all times on to a table and find an average time for each molarity.
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                                 For the second experiment

Method: -

  1. My colleagues and I will gather all our equipment together, along with the goggles to protect our eyes.
  2. Then we will divide our jobs so each one of us has our own duty. I will first fill a test tube with 20ml of HCL acid, and then we will put the acid into the conical flask.
  3. We will then put the Mg strip into the flask and ...

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