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

This experiment will show how the temperature and concentration affects the rate of reaction between sodium thiosulphate and hydrochloric acid.

Extracts from this document...

Introduction

This experiment will show how the temperature and concentration affects the rate of reaction between sodium thiosulphate and hydrochloric acid. Prediction I predict that the higher the concentration of sodium thyosulphate and hydrochloric acid the quicker the reaction. The higher the temperature also has a direct link to the speed of the reaction the higher the temperature the quicker the reaction. Scientific Explanation I believe my prediction to be correct because the collision theory states that the more molecules there are in a solution the greater the possibility of two reacting molecules colliding and forming a new substance. For example if I have placed 4 molecules of sodium thiosulphate 4 molecules of hydrochloric acid and only 2 molecules of water there is a greater possibility of reaction because the majority of the chemicals present can react with one an other. The more diluted the mixture is the longer it takes for a hydrochloric acid molecule to 'find' a sodium thiosulphate molecule. Neither sodium thiosulphate nor hydrochloric acid reacts with water so if they were to collide no reaction would take place. The concentration of each substance stays the same no matter how much of it we use for example if we used 25cm3 of sodium thiosulphate its concentration would remain the same as if we were to use 50cm3. ...read more.

Middle

If I was to wait for this to get to the right temperature then the test tube with the hydrochloric acid in would be too hot. I solved the problem by getting an extra thermometer and extra beaker. Instead of measuring the temperature of the water I would measure the temperature of the test tubes contents. The second beaker I would use to cool the test tube with the hydrochloric acid in while the test tube with the sodium thiosulphate continued to heat. Methord2- Temperature- I have made some modifications to my method this is how it will be carried out now: This is how I will carry out my experiment: * Set up equipment as shown in diagram * Put goggles on * Get 10cm� of hydrochloric in the small measuring cylinder and 10cm� of sodium thiosulphate and 40m� of water in the large measuring cylinder * Put a sticky label around the test tube that will have the hydrochloric acid in always put the hydrochloric in this test tube and the thiosulphate and water solution in the other * Measure the temperature with a 2 thermometers one in each test tube. * Allow the hydrochloric acid to exceed the desired temperature by 10- 15�C * Then take the test tube out and place it into the beaker of cold water while that is cooling down the sodium thiosulphate will be heating up * When you have the ...read more.

Conclusion

The only reasons for these results were such things as human error and miss-judgment for example miss reading the thermometer one person may have had better eye sight than the other he/she was working with meaning on person could still see the cross and the other not. Not washing out the apparatus thoroughly enough. Final reason was I used the temperature of the room on the day I did the concentration reactions and assumed it was the same temperature when I did the temperature reactions. I would like to carry on the experiment and carry on further work with it one of the things I would like to do is another experiment at 30�C I am not sure if any which one of these results is anomalous. I would like to carry out more experiments exceeding 70�C to see weather the rate of reaction continues to rise of weather and some point the line begins to level out. I could carry out more experiments that would enter the graphs on the curve to gain a better and more accurate graph. I could also investigate how pressure can change the rate of reaction does it slow or speed it up, maybe introduce a catalyst to speed up the reaction or even investigate how surface area affects the rate of reaction. By Robert Sanderson ...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. Marked by a teacher

    To investigate the effect of temperature on the rate of reaction

    4 star(s)

    40 37 180 86 87 88 87 74 75 72 74 36 38 42 39 190 89 90 89 89 79 80 77 79 40 41 42 41 200 94 93 93 93 81 83 82 82 43 42 44 43 210 94 97 95 95 88 89 87 88

  2. Marked by a teacher

    To see how the concentration of acid, reacting with potassium carbonate, affects the rate ...

    4 star(s)

    CO2 (cm3) 10 6 20 12 30 17 40 22 50 29 60 34 70 38 80 42 90 47 100 51 110 55 120 58 130 62 140 64 150 66 160 67 170 68 180 68 190 68 20cm3 of hydrochloric acid with 60cm3 water added: Time (seconds)

  1. Rate of reaction- Sodium Thiosulphate and Hydrochloric Acid.

    Therefore, as I increased the amount of water and decreased the amount of thiosulphate, the reaction will take longer and my graph line will curve down. Evaluation For 10cm3 sodium thiosulphate, 5cm3 of hydrochloric acid, and 40cm3 of water, it took 192 seconds for the cross to disappear.

  2. What factors affect the rate pf reaction between sodium thiosulphate and hydrochloric acid?

    Results Volume of Water in solution (ml) Volume of Sodium thiosulphate in solution (ml) Volume of Hydrochloric acid in solution (ml) Time taken for marker to disappear (minutes) 25 25 50 7:43 20 30 50 6:21 15 35 50 5:11 10 40 50 4:52 5 45 50 3:56 0 50 50 3:30 In order to get the

  1. Rates of Reaction

    Thus I will be conducting this experiment in order to see whether the concentration of hydrochloric acid affects the rate of reaction between it and calcium carbonate. Equipment I will be using the following apparatus in order to carry out this experiment: - Syringe - Conical flask - Rubber tube

  2. Rate of Reaction

    0.5, 2.5 and 3.0 were achieved by teaming up with other group from a different class), and if there are any results that don't follow the pattern I will repeat them. Also if there are any anomalies I will repeat the experiments, that is of course if there is time.

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

    If the acid is dilute, there is more space between the particles and have to travel a while before colliding and reacting with other particles. The reaction will take time thereby reducing the rate of the rate of the reaction.

  2. Rate of Reaction between Sodium Thiosulphate and Dilute Hydrochloric acid

    The temperature should have stayed the same because we were in the same place in the room throughout the investigation. Prediction:- My prediction is that when the Sodium Thiosulphate decreases, the reaction will increase in time because there will be less collisions because the particles wouldn't have enough activation energy to break up the bonds at great speed.

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