• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Measure the effect of concentration on the rate of reaction.

Extracts from this document...

Introduction

Rates of reaction Aim: To measure the effect of concentration on the rate of reaction. Introduction: The rate of a chemical reaction is a measure of how fast the reaction takes place. A rapid reaction is completed in a short time. Some reactions are very fast for example, the formation of silver chloride precipitate, when silver nitrate and hydrochloric acid solutions are mixed. Other reactions are very slow for example the rusting of iron. There are 6 factors that can change the rate of reaction theses include, Concentration of a solution, temperature, surface area of a solid, pressure of a gas, light and a catalyst. When increasing the concentration of the reactant, the rate of reaction will increase. If Sodium Thiosulphate is added to Hydrochloric acid the following reaction will take place: Sodium Thiosulphate + Hydrochloric acid Sodium Chloride + Sulphur Dioxide + Water + Sulphur = Nas2O3 + HCI NaCI + SO2 + H2O + SO The more concentration means that there are more particles of acid, moving through fewer particles of water. This means that there are more chances of some particles colliding with particles of another in a concentrated solution. After a while, many of the particles have reacted and change. Increasing the temperature will increase the rate of reaction. By warming a chemical it transfers Kinetic energy to the chemicals particles. ...read more.

Middle

So the more effective collisions there will be. I also predict this, as from my trail experiment it shows that as the more amount of Hydrochloric acid, was added to the Sodium Thiosulphate, the less time it took for the reaction to react. The graph shows the trial results from the trail run. Diagram Apparatus 1 Beaker, 1 measuring cylinder, 240ml Sodium Thiosulphate, 0.5m, 1m, 1.5m, and 2m of Hydrochloric acid, stopwatch, a piece of paper marked with a cross, and goggles. Method 1. We marked an X on a piece of paper, and placed it under the beaker. 2. We then measured 20ml of Sodium Thiosulphate with the measuring cylinder, and added this to the beaker. 3. Afterwards we then started adding 2 drops of Hydrochloric acid into the beaker, starting with 0.5m of Hydrochloric acid. 4. When all the Hydrochloric acid was added we timed how long it took for the X to disappear. 5. We then continued testing it with 8 drops then 10 drops, for all four of the Hydrochloric acids (0.5m, 1m, 1.5m, and 2m). Using s new solution of Sodium Thiosulphate each time. We only took 3 readings for each Hydrochloric acid, and didn't repeat any readings. Safety For this experiment goggles will have to be worn, to protect the eyes from the chemicals used. ...read more.

Conclusion

As I can't get a very accurate reading for the time it for the X to disappear, with just one reading. By repeating reading and working out averages, I would get a clearer picture of how long it would take for the reaction to happen. I could also improve measuring the rate of reaction, by doing a different and more accurate experiment. This experiment would be more accurate than the 'Disappearing X' experiment. The following reaction can be followed by measuring the gas evolved under a period of time, the diagram below shows how the experiment would be set out. It shows a reaction between Magnesium and Hydrochloric Acid. The following reaction would take place: Magnesium + Hydrochloric acid Magnesium Chloride + Hydrogen = Mg + 2HCI MgCI2 + H2 The Cornical flask contains Hydrochloric acid with Magnesium ribbon in it. The Hydrochloric acid would contain a particular amount of acid in it (0.5m, 1m, 1.5m, etc). When the Magnesium ribbon is put into the acid the volume of gas would be measured every 15 seconds, until it had stopped reacting. The amount of Hydrochloric acid that would be used would include 0.5m, 1m, 1.5m, and 2m. This experiment is more reliable and more accurate than the 'Disappearing X' experiment. Overall, I do think my evidence is quite reliable as my results show what I thought they would. Also my experiment went quite well, as I had proved what I had set out to do, which was to prove that concentration does affect the rate of concentration. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Patterns of Behaviour section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Patterns of Behaviour essays

  1. An investigation into the effect of concentration on the rate of reaction. The disappearing ...

    From my results I have shown that this is true. When we say the concentration affects the time for the precipitation to form we mean that when there is a higher concentration there is physically more of the particles. In this case there would be more hydrochloric acid particles (2HCL)

  2. Free essay

    Close Your Eyes

    "Ok, here's what you do" he leaned forwards "you call her and ask her what's up with her. It's the only way you're going to get and honest explanation." That was his advice? Phone her. Well, I suppose I could give it a try. I thanked him and he nodded.

  1. How does changing the concentration of hydrochloric acid affect its rate of reaction with ...

    I will pour the liquids directly into the conical flasks from the measuring cylinders. I will do this to all of the other solutions as well. When I have made all of the hydrochloric acid solutions, I will label them so I know which is which for the main experiment.

  2. Investigating the Effect of Different Concentration Of Acid Rain On The Rate Of Reaction ...

    for different runs of the experiment then the results would be incomparable. Therefore the apparatus I start with will be marked in order to make sure no apparatus which I am using is misplaced. * Friction In Gas Syringe. The friction of the gas syringe must remain constant; whether this

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work