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An Investigation into the Rate of Reaction Between HCL and Mg.

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Introduction

An Investigation into the Rate of Reaction Between HCL and Mg Aim The aim of this investigation is to see how concentration of acid effects the rate of reaction between HCL and Mg. The rate of a reaction is how fast the reactants are used up in the reaction. In this investigation we will test different concentrations of acid reacting with magnesium ribbon. Prediction I predict that as the concentration of HCL increases the amount of gas given off by the reaction will increase. Linking Prediction to Theory An increase in concentration is an increase of particles in a given volume. If we increase the concentration 1) The particles are more crowded so they collide more often. 2) The particles themselves do not increase in energy but, there are more particles in the given volume. ...read more.

Middle

= 60ml HCL + 40ml H20 1M = 50ml HCL + 50ml H20 0.8M = 40ml HCL + 60ml H20 0.6M = 30ml HCL + 70ml H20 0.4M = 20ml HCL + 80ml H20 0.2M = 10ml HCL + 90ml H20 I will then measure out 10ml of the HCL solution, then I will add the Mg ribbon, I will try to pay special attention to getting the time exactly so that it is a fair test. I will time for 20 seconds and using the beret I will measure how much gas is given off. I will then repeat the experiment 3 time so that I can get even and average results. Results HCL Concentration Mg Amount (Grams) Time (seconds) Gas Produced (ml) 2M 0.05 20 47 50 53 1.6M 0.05 20 24 24 29 1M 0.05 20 19 19 24 0.5M 0.05 20 8.5 11 13.5 ...read more.

Conclusion

FIG.1 2M HCL 0.5M HCL Evaluation During this investigation there have not been any rouge results and all of our results were as we expected them to be. However our results could not be 100% accurate for several reasons such as our equipment was not 100% accurate, for example our measuring cylinders could have been off by some very small fraction and that could have amounted up. When the reaction takes place bubbles are given off ,which sometimes did stay around the Mg which therefore reduces the surface area of the Mg and so the HCL could not react properly so this could effect the results. We could have controlled the stirring of the solution because if this is not done properly it can lead to incorrect results. Using larger concentrations of acid would give a bigger more accurate conclusion instead of just using 10ml testubes use 1litre testubes, this way graphs would be more spaced out and give a more accurate reading. ...read more.

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