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

Experiment to show how concentration affects the rate of reaction

Extracts from this document...

Introduction

Experiment to show how concentration affects the rate of reaction Prediction I predict that the reaction time will be quicker when the concentration of the acid is more concentrate. This is because when acid is more concentrate there are more particles Thio present to bump into the acid, this is what causes the reaction. Sodium + Hydrochloric Sulphur + Sodium + Water Thiosulphate Acid Dioxide Na S O (aq) + 2HCL (aq) S (s) + 2NaCL + H O Apparatus Sodium Sulphate Hydrochloric acid Water Conical flasks Pipette Stop watch Measuring cylinders Fair Test To make the experiment a fair test we will always use the same amount of Hydrochloric acid in this case 5 cm3. The total amount of Thio solution will always be 50cm3. All the experiments will be carried out at room temperature. We will use the different measuring cylinders for the acid and Thio solution to keep them apart until we start timing. When the acid is added we will swirl it 3 times. ...read more.

Middle

8. Repeat the experiment another 3 times using 20cm3 of Thio, 30cm of water and 5cm3 of acid. Record your results. 9. Lastly do the experiment 3 times using 10cm3 of Thio, 40cm3 of water and 5cm3 of acid. Record the results. 10. Place all results in a table and calculate the average time for each experiment. Concentration of Thio 2m 1.6m 1.2m 0.8m 0.4m Vol. Thio (cm3) 50 40 30 20 10 Vol. Water (cm3) 0 10 20 30 40 Vol. Acid (cm3) 5 5 5 5 5 Ex. 1 time 31.12 38.60 55.84 78.72 207.72 Ex. 2 time 29.84 37.90 54.97 79.43 207.21 Ex. 3 time 30.69 38.37 54.88 80.82 206.27 Average Time 30.55 38.29 55.23 79.67 207.06 NB red writing indicates when a new batch of Thio (sodium sulphate) was used Analysis and Conclusions The more concentrate the solution the quicker the ' X ' disappeared i.e. ...read more.

Conclusion

The graduations on the cylinders were very faint, therefor hard to read accurately. To get rid of this problem we would have to use new equipment which would be far too expensive. For four of the experiments I used a new batch of Thio which could have made a difference, fortunately not in my case. My graphs show that I didn't obtain any anomalous results, so my results must have been accurate. As with any experiments you are going to encounter difficulties, although there were a few I think it was a good procedure and as long as you carry it out slowly and cautiously you will obtain accurate results. I think my results draw a firm conclusion that concentration does affect the rates of reaction, i.e. the more concentrate a solution the faster the rate of reaction. Dilute Solution Concentrate Solution The diagrams above show that in a more concentrate solution there are more particles present. This means that the reaction will take place quicker because the sodium Thiosulphate is able to collide into more particles which makes the reaction happen faster. ...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 Aqueous Chemistry 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 Aqueous Chemistry essays

  1. Antacid Experiment.

    it took an average of 14.7cm-cubed of hydrochloric acid to neutralise it. Boots were the worst because it only took 9.3cm-cubed of hydrochloric acid to neutralise it. TABLET AV. START AV. FINISH AV. TITRATION Superdrug 0cm-cubed 9.53cm-cubed 9.53cm-cubed Bisodol 0cm-cubed 12.83cm-cubed 12.83cm-cubed Boots 0cm-cubed 9.33cm-cubed 9.33cm-cubed Rennies 0cm-cubed 14.73cm-cubed 14.73cm-cubed

  2. "What Affects How Quickly Sodium Thiosulphate (thio) Goes Cloudy?"

    the longer it takes to react, the pattern does agree with my original prediction. The results in blue are my preliminary results and the ones in pink are my secondary results, as you can, if I draw a line through both sets of data, I get a nice smooth curve.

  1. to investigate how the concentration affects the rate of the reaction

    measuring the magnesium because I am relying on when the magnesium disappears and forms the new substance. During my experiment, I found out that if a large amount of magnesium reacted with a large amount of hydrochloric acid, the reaction will go over the top and the hydrogen produced cannot be recorded.

  2. Investigating how concentration affects rate of reaction

    more collisions are possible every second, but I am doing the opposite so there should be fewer collisions possible every second. Concentration This is a table to show the concentration of the chemicals and the amounts I will be using.

  1. How Concentration of Acid affects rate of reaction.

    way to uniform the amount of shaking/stirring is simply to do none at all. Equipment * Hydrochloric acid - I tried using sulphuric acid in the preliminary experiment, but the reaction was over too quickly to accurately record the results for the quickest acting(most concentrated)

  2. Investigating how concentration affects reaction rates.

    The two clamp stands will securely hold the Burette and Gas syringe in place. The conical flask will contain the acid, water and marble chips so it is able to react in a container. The goggles are used to protect each of our eyes in case of accidents.

  1. This experiment will show how the temperature and concentration affects the rate of reaction ...

    Whenever an acid reacts with an alkali we always get water as one of the products, the other is a salt made from the acid and the alkali. In this experiment the sulphur will sink and this will play a key role in how we record the amount of time taken in each experiment.

  2. How the concentration of acid affects the rate of reaction?

    goggles at all times, I am going to make sure that I have got a heat proof mat underneath my experiment at all times and also to make sure I take my time when walking or carrying glass or acidic objects.

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