Investigation into the rates of reaction of magnesium with hydrochloric acid.

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Investigation into the rates of reaction of magnesium with hydrochloric acid

Aim: To discover how the rate of reaction of magnesium with hydrochloric acid varies when the concentration of the hydrochloric acid is changed.

Prediction: After doing previous experiments, I have decided that an investigation to see if concentration changes the rate of reaction will be the best to work with. I could have investigated other factors that affect the rate of reaction such as: Surface area, pressure, surface area, temperature of acid and light. Working in a classroom environment, the concentration will be easiest to test, as it doesn’t require lots of sophisticated equipment and will give me sufficient results to be able to plot a graph.

I predict that the highest concentration of acid will react the quickest. I think this because according to the collision theory, if the concentration is higher, the chance of collisions is more likely. E.g. 1 molar acid is likely to react slower than 10 molar acid because there are more of the acid particles in the same area, therefore there is a higher probability of a faster reaction.

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Method: To investigate how the rate of reaction changes with the concentration of the acid, I will use a stopwatch to record how long the reaction takes with different concentrations of hydrochloric acid. I will take it that when I can no longer see the magnesium ribbon that the reaction has finished.

        To make it a fair test I must keep the following the same: volume of acid, weight ...

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