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I am going to investigate how concentration and temperature affects the rate of reaction between magnesium ribbon and hydrochloric acid.

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Introduction

Science GCSE course work WHAT I AM INVESTIGATING I am going to investigate how concentration and temperature affects the rate of reaction between magnesium ribbon and hydrochloric acid. MY PREDICTION The thing which I expect to happen is the more acid added to water the faster the reaction will happen. Also the hotter the solution the quicker the reaction will happen. THEORY TO BACK UP PREDICTION This will happen because when the temperature increases it will give the particles energy which will make the particles move quicker causing more particles to "collide" this will make the reaction quicker. I predict that these factors might have an effect on the results 1. Temperature- how hot or cold 2. Concentration- how much acid, how little 3. surface area- how big or small 4. Time- how fast, how slow 5. Catalyst- will speed up the reaction but won't get used up. 6. mass of magnesium- how much magnesium The idea that I am going to investigate is how the increase of temperature will affect the speed of reaction. ...read more.

Middle

Also to make sure that the experiment is a fair test and to make it more accurate I will do the experiment three times. I will keep these things the same because I want the experiment to be a fait test. (Keeping the amount of concentration the same, the length of the magnesium strips the same) I will have change the amount of acid and the amount of water in each experiment. I am going to keep the magnesium strip the same for each experiment. I am going to use measuring equipment such as a cylinder so that I keep the experiment accurate and fair. I will use a stop each which will also keep the experiment accurate. I'm going to do the experiment three times so that the experiment can show an average which will give a better and fairer result. Method * First I will get my equipment set up ready to start the experiment. * Then I will measure out the acid and water and place them in a beaker. ...read more.

Conclusion

I think this because we all worked well as a team. However my experiment could have been improved by being more accurate with the timing. Instead of timing it to 2 decimal places I could have timed it to 3 decimal places and then it would have been more accurate. If I was to do my experiments again change the amount of experiments going on at the same time because the experiment would have gone a lot quicker. There was a slight anomalous result on my graph. There are two results that don't fit the line of best fit. This happened because we weren't very accurate at these points on stopping the stop clock at exactly when the magnesium dissolved. If I did this experiment again I would have to be more accurate at stopping the stop watch at the right time. My results, on conclusion were generally good. They concluded what I predicted. The equation for this experiment and the results is metal + acid --> salt + Hydrogen --> gas ?? ?? ?? ?? Rebecca Childs ...read more.

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