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

How does the temperature Affect the rate of reaction For the chemicals hydrochloric acid And sodium thiosulphate.

Extracts from this document...

Introduction

Nick Martin Set 1 Science 12/01/02 How does the temperature Affect the rate of reaction For the chemicals hydrochloric acid And sodium thiosulphate. Aim The experiment will involve me adding a fixed amount of hydrochloric acid and sodium thiosulphate together and by seeing when it goes cloudy investigate how long it takes for them both to react when they are at different temperatures. Research A reaction rate is measured in two ways: either the quantity of the product made or the time it takes for the substances to react. Rate of reaction differs from chemical to chemical; for example the chemical reaction I am studying will last an average of thirty-two seconds at room temperature. However many other reactions like rusting will happen over a longer period of time. There are seven main factors affecting the rate of a reaction: * Concentration, * Pressure, * A catalyst, * Surface area, * Particle size, * Light, * Finally, temperature is the one I will investigate. ...read more.

Middle

I then proceeded to put all of my results into a table, which I used to draw up my graphs. Fair testing was inevitable for accurate results. Many things were taken into account when doing the experiment like for example: * All equipment was kept constant, e.g. volume of conical flask, * Room temperature, * Concentration of acid, * Amount of chemicals, * Contamination of chemicals. To combat each of these I made sure that I wrote down the constant values I used in the first experiment and repeated these values in all the following ones. Checked to see if the room temperature varied about or below 2�C from the temperature at the start of the first experiment. Finally I made sure that all beakers, flasks or measuring devices were cleaned and dried before being re-used to minimize contamination between chemicals. Results I have put all of my results into tables and then into graphs (see attached graphs). ...read more.

Conclusion

Evaluation I think the experiment was successful. I might have been able to improve my results by using more finely tuned equipment or repeating the experiment more times. I encountered 1 anomaly in my results, and this may be explained by the only drawback in the result accuracy: human error when operating the stopwatch. I feel I could do more to expand on the original question set by perhaps doing other experiments linking with this one like looking at for example: * Concentration, * Pressure, * A catalyst. I may have been able to study concentration; the more concentrated a product is the more particles there are to react in the same volume. Therefore, the products will collide more and react faster. Pressure will cause the particles to be forced closer together and therefore react faster. Finally, a catalyst will increase the rate of reaction by making the products react quicker while not reacting or breaking down itself. This can be very useful as it can be used over and over again. ...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. How does temperature affect the rate of reaction between sodium thiosulphate and hydrochloric acid?

    This is because by this time there is a lot of heat, which gives the particles of sodium thiosulphate and hydrochloric acid more energy, so they move around more quickly than before. Obviously, at a higher velocity the particles are going to be more likely to collide.

  2. Free essay

    Close Your Eyes

    "Dougie do you have any idea how worrying that was? I love Danny and I've just gone and slept with his best mate! How do you think that makes me feel? He just almost caught us and now I've got to go downstairs and face him.

  1. How does the Temperature affect the Rate of Reaction between Sodium Thiosulphate and Acid?

    In a solid though the bigger the surface area the faster the rate of reaction. This is because when the surface area is larger there are more surfaces for the particles to react with. Breaking it up into smaller pieces increases the surface area of a solid.

  2. How will the temperature affect the rate of reaction with sodium thiosulphite and ntric ...

    am going to be investigating and explaining about is: temperature, as I state before. Changes in temperature, change the kinetic energy of the particles and therefore the numbers of successful collisions. If there is enough kinetic energy then the bonds between each atom will break (going from a liquid to a gas).

  1. How does the Temperature affect the Rate of the Reaction between Sodium Thiosulphate and ...

    The same person must measure the time it takes for the cross to disappear because eyesight of pupils may vary. The time must be measured using the same type of stopwatch, not a wall clock as the accuracies vary. Possible Errors The volumes of liquids must be read off the measuring cylinders given in the apparatus section above.

  2. Investigate the rate of a catalysed reaction, when altering the temperature of the solution ...

    In this structure, as well as hydrogen bonds, there are also other bonds called Sulphur Bridges and Vander Waal forces. These bonds make the active site and hold it. It is at the active site, the enzyme interlocks the substrate molecule and hold it so that the water molecule can act on it.

  1. How does the Temperature affect the rate of the reaction between Sodium Thiosulphate and ...

    Light intensity will affect how long it takes before the person judging cannot see the cross anymore. As if there is a higher light intensity it will be a lot easier to see the cross. Also the person who is judging whether or not they can see the cross makes a difference as we all have different eyesight's and judgement.

  2. How does temperature affect the rate of a chemical reaction?

    I will only be able to record the result at the end of the experiment for that is the only time there is a visible signal that something has happened - there has been a chemical change. However, I will repeat each experiment three times and take the mean, in

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