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

The Rates of Reaction Between HCl and Na2S2O3.

Extracts from this document...

Introduction

The Rates of Reaction Between HCl and Na2S2O3 Introduction This is an experiment to explore the rate of reaction when HCl (Hydrochloric Acid) reacts with Na2S2O3 (Sodium Thiosulphate). Also to find the rates of reaction I am going to dilute the HCl to test the particle collision theory. Equipment List Safety Glasses A pipette A conical flask 2 x measuring cylinders Bottle of Na2S2O3 Bottle of HCl Stop clock Piece of white paper with black cross Safety To ensure safety in this experiment I follow these rules: Always wear safety glasses Stand at all times Report any spills imediately Follow basic lab safety rules Work tidily Be sensible with equipment Method This experiment is not a hard one to set up or carry out. Firstly, I will place the conical glass on the piece of paper, making sure that the glass is clean so I can see the cross clearly to start with. Then I will measure out 25cm� of Na2S2O3 using one of the measuring cylinders. I will then pour it into the conical flask, making sure not spill any as I do it. ...read more.

Middle

Also, temperature will be a factor, I will have to try to do the experiment in the same temperature, but unfortunately i cannot control this so it may affect my experiment slightly. Prediction The particle collision theory tells us that the higher the concentraion the greater the chance of the reaction occouring. When the water is added, it decreases the concentration, so it greatly decreases the chance of the sodium thiosulphate molecules coliding with the hydrochloric acid molecules. In contrast to this, when there is less water, there are more molecules to collide so there is a greater chance of the mollecules coliding in the right orientation, so they bond, this means the reaction will happen faster. This leads me to predict that as I increase the concentration of Hydrochloric acid increases the time it takes for the solution to fully react will decrease, so the rate of reaction will increase. Results Analysis As the concentration of the acid increases, the average time it takes for the reaction to take place decreases, so the rates are increasing. My results and graph both show that my prediction was correct, however I think that the whole of the second set of results are anomalous. ...read more.

Conclusion

A colorimeter measures the intensity of light that travels through the solution. This would be better than using the cross, because you could just stop once you reach a certain intenstiy. I think that my results are vaild and that my experiment was fair. The set of results one and three are very similar and this shows my results are valid. My investigation was fair, the only thing that affected the experiment was the temperature, which I have no power over. I could have perhaps carried out this experiment more times but I know that it would have just showed the same as what my results already show me. It would have been better though for my conclusion had I done a couple of more experiments because I would have been able to analyse my results more. Also, if I was doing an investigation on the particle collision theory and not reaction rates, then I could have used all the variables, in different experiments, that I have stated throughout this investigation. Overall, I think that this investigation went really well as I had no real difficulties, apart from stopping the stop clock on time. I believe that this experiment is suitable and could be used by anyone to test the rates of reaction for HCl and Na2S2O3. ...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. Marked by a teacher

    In my investigation I am going to look at how concentration affects the rate ...

    3 star(s)

    Controlled Variables - ==> Volume of hydrochloric acid ==> Concentration of hydrochloric acid ==> Volume of sodium thiosulphate solution ==> Temperature of hydrochloric acid and sodium thiosulphate solution ==> Same apparatus The dependent variable is the factor that is going to change naturally Dependent Variable - ==> Time for the

  2. A-Level Investigation - Rates of Reaction – The Iodine Clock

    0.005 0.006 0.007 0.008 0.009 0.010 Conclusions From the graphs of Rate against concentration, I have determined that the reaction is: Zeroth order with respect to [H+] First order with respect to [H2O2] First order with respect to [I-] The overall rate equation is therefore: Rate = k [ H+

  1. Investigating the effect of temperature on the reaction between Sodium Thiosulphate (Na2S2O3) and Hydrochloric ...

    I will not go above 60�C because the reaction would happen so quickly that it would be difficult to take an accurate time measurement. I will not go below room temperature because not only will it be difficult to get the solution to an accurate temperature, but the reaction would happen very slowly.

  2. Reaction between sodium thiosulphate solution (Na2S2O3) and dilute hydrochloric acid (HCl)

    But if the acid is more concentrated there are more H+ ions thus there is a greater chance of a successful collision occurring. At the start there are plenty of H+ ions and atoms of the other reactant, but during the reaction they get used up.

  1. How much concentration of sodium thiosulphate (Na2S2O3) affects the rate of reaction when tested ...

    Heat gives them more energy to move around and so increases the chances of a collision. When particles do collide, they are more likely to react, rather than just bounce off each other, if they are moving faster. Cooling has the opposite effects.

  2. Investigating making Epsom salts by varying the rates of reaction.

    It is possible to work with water and the sulphuric acid, but lots of precautions would need to be taken and what will need to be done is that the acid will need to be added to the cold water slowly, and it should always be that way around it

  1. An investigation into a factor affecting the rate of reaction of sodium thiosulphate (Na2S2O3) ...

    This makes it easier to refer to as this is how I recorded my results. Prediction: I believe that as the concentration of sodium thiosulphate increases, so the rate of reaction will increase, thereby showing a positive correlation. This prediction is partly based on my preliminary findings and partly on common sense.

  2. Investigate how temperature affects the rate of reaction of sodium thiosulphate (Na2S2O3) and hydrochloric ...

    When two reactant substances are mixed (acid, alkali or acid, base etc.), if the molecules collide in a certain way and with enough force the reaction will occur. This is the collision theory. The amount of energy needed to give the atoms or molecules the strength to collide so that they react is called the activation energy.

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