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How Temperature Effects The Rate Magnesium Reacts In Hydrochloric Acid.

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Introduction

How Temperature Effects The Rate Magnesium Reacts In Hydrochloric Acid There are many factors which affect the rate of reaction, a catalyst, area of particles, concentration, temperature and pressure. I will be focussing on how temperature affects the rate of reaction. Aim - To study whether the temperature of hydrochloric acid affects the speed at which magnesium completely dissolves inside it. The equation of this reaction is: Hydrochloric acid + Magnesium Magnesium Chloride + Hydrogen 2HCL + Mg MgCl2 + H2 Hypothesis - I predicts that by increasing the temperature of the acid, I will increase the rate at which magnesium dissolves in hydrochloric acid. Theory - The collision theory states that the rate of reaction depends on how often and how hard reacting particles (i.e. ...read more.

Middle

Apparatus - * Magnesium Strips (length 2cm, width 0.6cm) x 12 * Hydrochloric Acid (300ml) * Boling Tube * Test Tube Rack * Measuring Beaker (volume 150ml) * Beaker (volume 300ml) * Tongs * Kettle * Thermometer * Stop Watch Method - 1. Firstly, I will measure out 25ml of acid in a measuring beaker. 2. Secondly, I will transfer the acid into a boiling tube. 3. Then, I will put a thermometer into the boiling tube of acid, and put the boiling tube into a beaker of boiling hot water and wait until the acid reaches the desired temperature (20�c). 4. Fourthly, I will use tongs to put the boiling tube into a tube rack and then add the magnesium and begin to time it with a stop watch until it completely dissolves. ...read more.

Conclusion

This is shown in my graph as a negative correlation. This happened because, as stated in my theory, the particles of acid and magnesium sped up as they were heated and so they collided more and more, increasing the rate of reaction. The higher the temperature got, the faster the magnesium dissolved. As the temperature increased I observed that the difference in time taken to dissolve has decreased. Firstly there is a gap of 1.30 mins from 20�c to 30�c but then the difference dramatically decreases to 0.06 mins, this may be the effect of an anomalous result. Evaluation - If I had more time, I would have tested a much broader range of temperatures to see if my results remained constant. The anomalous results I encountered may have been from a fault in the timing or the temperature. After doing this experiment, I would like to further test the other factors which affect the rate of reaction. ...read more.

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