The effect of concentration on the rate of reaction between hydrochloric acid and magnesium ribbon

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The effect of concentration on the rate of reaction between hydrochloric acid and magnesium ribbon

Plan

The rate of reaction can be affected by these factors,

* Temperature

* Concentration

* Size of surface area

* And by adding a catalyst

I have chosen to investigate the effect of concentration.

This will be done be investigated by diluting acid and timing how long it takes the same amount of magnesium ribbon to dissolve. I will obtain evidence by diluting the acid with 5ml of water each time, then timing how long it takes the magnesium ribbon to dissolve fully. The experiment will be done 6 times. This experiment will be repeated 2 times then the average of the two will be worked out. To make this a fair test the same amount of magnesium ribbon must be used. I have 60 cm of ribbon to use; each time the experiment is done I will use 4cm. This leaves 12cm to check any anomalous results. Also to keep a fair test the temperature must stay the same, the fore the experiments will all be carried out at room temperature. The apparatus I intend to use are as follows; Stop Clock, 50ml measuring cylinder and a 250ml-measuring beaker.
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Prediction

I predict that the less concentrated the acid, the slower the rate of reaction. I predict this because of the collision theory. The higher the concentration the higher the number of collisions per second. This therefore gives a faster rate of reaction

Method

50ml of hydrochloric acid was measured out in a 50ml-measuring beaker; the acid was then added to the 250ml beaker. To the beaker 4cm of magnesium ribbon was added. The stop clock was then started. The clock stop was stopped when the magnesium ribbon had fully dissolved; the time it took ...

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