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# How changing acid concentration changes the rate of reaction.

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Introduction

How changing the concentration changes the rate of reaction. Introduction We are going to look at the following factors during this investigation: 1 Why altering rate could be an advantage 2 Good ideas to control the rate of reactions 3 Briefly mention the factors that can change the rate of reaction such as: - Temperature Surface Area Catalyst Concentration I am going to find out if changing the concentration of nitric acid in water and see if it has any effect on changing the rate of which precipitate is formed when reacts with sodium thiosulphate. Prediction I think that a faster reaction will happen with a higher acid concentration as there will be more successful collisions with sodium thiosulphate, which will result in a faster reaction because the product will be produced quicker. ...read more.

Middle

Each time we will decrease the Nitric Acid and increase the volume of water to see which one holds the fastest reaction. Our final amount of Nitric Acid should be 5cm� and 10cm� of water. I will repeat the experiment 3 times to make sure that my results are as accurate as they can be. I will then record my results onto a graph so I can compare them better and make a line of best-fit graph to show my results even clearly. How will I make it a fair test? To make sure that my experiment is fair I will always use the same amount of Sodium Thiosulphate and the only factor I will change will be the volume of Nitric Acid and water but only to total 15cm( so the depth of the liquid will always be the same. ...read more.

Conclusion

To make sure it was a fair test we always used separate measuring cylinders, for the water and the acid, also having the same volume of mix. We could have improved this experiment by using a wider range of acids but also we could have used a completely different experiment altogether such as "change in mass" or "the volume of gas given off". And if doing so, we could have compared results. Conclusion From analysing my graph it is clear to see that the greater the acid concentration the quicker the reaction, this brings me back to my prediction, because the acid concentration is higher, this makes collisions between the important particles more likely and so more collisions makes a faster reaction. ?? ?? ?? ?? ...read more.

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