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

Relate how different concentration of sodium thiosulphate reacts with various concentration of hydrochloric acid.

Extracts from this document...

Introduction

CHEMISTRY COURSEWORK (Sodium thiosulphate reacting with hydrochloric acid) Aim: To relate how different concentration of sodium thiosulphate reacts with various concentration of hydrochloric acid. Reaction involved will be: Sodium thiosulphate + Hydrochloric acid Na2 S2O3 + 2HCI Prediction: I have strongly predicted that according to the collision theory, higher concentration on sodium thiosulphate and a collision with lower concentration amount of water, the speed of the reaction will definitely increase. Sodium Chloride + Water + Sulphur Dioxide + Sulphur I have also decided to keep the concentration of acid constant (5ml) while varying the concentration of sodium thiosulphate (10-50 ml). Apparatus: 1 thermometer 1 beaker 2 measuring cylinders 1 conical flask 1 tripod 1 gauze 1 heatproof mat 1 stopwatch 1 Bunsen burner X board 1 pair of tongs 1 pair of goggles 1 apron Practical 1 Method: Firstly make sure that you have carried out a health and safety check on the equipment and the environment the experiment is being taken. Draw out a table to represent where all the results will be placed after the experiment is done. ...read more.

Middle

The water is heated to the necessary temperature (30�C to 70�C) then the two measuring cylinders are taken out and the contents of both are poured into a conical cylinder. The time it takes for the X to disappear is timed and recorded. The experiment is repeated using all the temperatures. The entire procedure is then repeated. Repeated results and averages will be taken to improve the credibility of the findings, and present solid grounding for the final conclusion. Fair test: In order to prevent this experiment from turning into an unfair test a few things will have to be taken into consideration .First (filtration) making sure that when measuring both the water and acids (thiosulphate) they were the only liquid substances in the tube also the reading being taken by more than one persons would also be reliable as it will help with the recording of results. An assistant will also be appropriate during the prompt starting of the stopwatch. Results: Experiment 1 Thiosulphate solution Water Acid Dilute Time(secs) 10 40 5 0.18 391 20 30 5 0.36 345 30 20 5 0.54 270 40 10 5 0.72 141 50 5 0.90 81 Experiment 2 Temp(�C) ...read more.

Conclusion

During the second experiment I realised that the effect of heat (temperature) within the practical was that the higher the temperature within the water it resulted in the sodium thiosulphate clouding up quicker, I measured this in seconds to reassure myself between the difference and the comparisons of both experiments. The collision theory appeared to take place in both my experiments and it also matched with my prediction before these experiments were taken out. Now that I have completed the experiments testing how sodium thiosulphate reacts with both different volumes of (acid & water) and with various temperatures of water ranging from 20-70 degrees Celsius, I have com with the conclusion that sodium thiosulphate reacts most properly when there are less other solution for it to collide with when reacting and that also the varying of different temperatures of water helps speed up the reaction. Evaluation: Having completed the experiment I am generally pleased with my results as I can genuinely say that they matched my prediction and that they are near perfect. But throughout the experiment I realise that it could be improved by having an assistant which would have made things not just smoother but it would have helped with conducted a fairer test. ...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. What factors affect the rate pf reaction between sodium thiosulphate and hydrochloric acid?

    However I did have one anomaly in my results that did not fit the line of best fit very well. The rate of reaction for my 0.045M solution of sodium thiosulphate was 4.2 � 10-3 when it was predicted by my line of best fit to be 3.85 � 10-3.

  2. Investigation into the efficiency of various indigestion tablets.

    * funnel * beaker for HCl * beaker for H2O * 0.1M HCl * Purified H2O * Methyl Orange Indicator * Indigestion tablets Final Method I will go through my experiment in detail, stating reasons for my actions where appropriate.

  1. copper practical

    The dry ore is mixed with sand. The word equation of this reaction is as follows: CuFeS2+ 5O2+2SiO2 2Cu2S,FeS + 2FeSiO3+ 4SO2 2) The matte and lag are tapped off separately. Sulphur dioxide is used to create sulphuric acid. 3) Air and sand is reacted with matte.

  2. Finding the Concentration of an Acid.

    But sulphuric acid is also produced naturally from volcanoes. Sulphur dioxide is a very soluble gas and combines readily with water and oxygen in the atmosphere to form sulphuric acid. This then falls to earth as acid rain. Acid rain is a very harmful environmental problem. Acid rain can kill vegetation, for example the Black Forest in Germany has suffered from the effects of acid rain.

  1. Determine the concentration of lime water.

    So any error through equipment is minimal, yet it still has to be taken into consideration. I feel that there was little limitation in the procedure and any limitation was minimal. An example of this is the minute splashes that occur in the conical flask during the titration, which some of it gets on the walls of the conical flask.

  2. Investigate the effect of reducing the concentration of Sodium Thiosulphate on the speed of ...

    We can also have more successful collisions by heating the mixture, stirring it and also increasing the concentration. Kinetic Theory When the Particles within the experiment are heated it will cause them to move much more quickly therefore there will be more successful collisions.

  1. Sodium thiosulphate is a colourless liquid that reacts with hydrochloric acid as follows:

    The more successful collisions there are, the faster the reaction. In dilute acid, there are not so many acid Here the acid is more concentrated. particles. This means there is not much chance There are more acid particles in it.

  2. The Effect Of Concentration Of The Reaction Between Sodium Thiosulphate And Hydrochloric Acid

    Catalyst is very important in industry because they speed up reaction even at low temperatures. This means that less fuel is need, so money is saved. The optimum temperature for a catalyst is at the degree of 37. If the temperature is too high the catalyst will denature.

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