• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10

Investigating the rate of reaction between sodium thiosulphate and hydrochloric acid.

Extracts from this document...

Introduction

Investigating how the concentration of sodium thiosulphate affects the rate of reaction This coursework will be investigating how the concentration of sodium thiosulphate affects the rate of reaction when mixed with hydrochloric acid. In order to carry out this investigation, different experiments will be carried out. The rate of reaction can be seen as the rate of loss of one or both of the reactants or the rate of a new chemical product being developed as a result of the chemical reaction. The main reason for the experiments is to see if the prediction proves to be accurate and to record how long it takes sodium thiosulphate and hydrochloric acid to react together by using different concentrations of sodium thiosulphate ( Na2S2O3) in each experiment. An indication of a successful reaction is when the colourless liquid goes cloudy and the x that the beaker was on top of is no longer visible. The word equation for the reaction between sodium thiosulphate and hydrochloric acid is: + + + + The symbol equation for the reaction between sodium thiosulphate and hydrochloric acid is: + + + + The factors that will be controlled are making sure that the amount of HCL in each experiment stays the same and also making sure the volume of all the reactants in each experiment stays the same. ...read more.

Middle

For example a 5g of calcium carbonate as fine powder will have a greater combined surface area than a 5g chunk of calcium carbonate. This is evident in simple things like chewing your food as this process breaks down the food into smaller pieces which will increase the surface area so the digestion of that food will be faster. Concentration Concentration will affect the rate of reaction as by increasing the concentration of sodium thiosulphate it will increase the amount of times that it collides with the particles of the hydrochloric acid solution. Also if we take into account that when the two particles collide, it is not all the time that they will have enough energy to start a reaction as each of the molecules will have different energy levels. An increase in the concentration will increase the amount of collisions there are and will affect the amount of colliding molecules that do have sufficient energy levels to react together. Catalysts Catalysts will affect the rate of reaction as it will speed up the reaction by either lowering the activation energy required to start a successful reaction when the hydrochloric and sodium thiosulphate particles collide or making the conditions right for a chemical reaction to take place to take place or both. ...read more.

Conclusion

To indicate a successful reaction and when we stopped the experiment was when the cross underneath the beaker was no longer visible so we made sure that by keeping the colour, size and shape of the cross exactly the same so that it would not affect our results. And as we used a stopwatch, we made sure that the person that was holding the stopwatch started the time as soon as both of the chemicals was added to the solution of hydrochloric acid in the beaker and also we made sure that they was the one that stopped the clock when they could no longer see the cross because if it were another person that was looking at the solution until they could no longer see the cross and then had to relay that to the person as in telling them when to stop, this would have wasted time and affected our results as the time it took the cross to disappear might be increased by a significant amount which would be due to human error. Results Volume of s.t/cm3 Volume of distilled H20 added/cm3 Concentration of mole /dm-3 Volume of hydrochloric acid added/cm3 Results/Time taken 50 0 0.15 40 10 0.12 30 20 0.09 20 30 0.03 10 40 0.01 Various sites and textbooks were used which provided the information I needed. ?? ?? ?? ?? Science coursework Lopez Okhiai - 1 - ...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. Peer reviewed

    Study on food colourings

    5 star(s)

    Should food colourings be used at all? Are there enough benefits to outweigh all the risks of using food colourings? Benefits * Makes food more appealing * Masks discolouration in food * Decoration purposes * Protect food from light damage Risks * Possible threat of cancer * Possible cause of hyperactivity * Other health risks In my

  2. The reaction between Sodium Thiosulphate and Hydrochloric Acid.

    filled with 100cm3 of water * Boiling tubes * Thermometer * 25cm3 of Sodium Thiosulphate * 25cm3 of Hydrochloric Acid (and water) * Computer * Light Sensor * Bulb * Battery * Wooden Box with computer I said I would change my method and get rid of the Bunsen burner

  1. Free essay

    Close Your Eyes

    I had the time to take a sip pain gripped my stomach and I had to hold onto the side to stop myself from falling over. What the fuck? Must have just been from all the alcohol. I took a sip and was struck again by pain throughout my stomach,

  2. Investigate how concentration of hydrochloric acid (HCL) affects its reaction with calcium carbonate (CaCO3).

    In my prediction, I also stated that if the concentration of acid is doubled the rate of reaction would double. I believed this because if the concentration doubles, I found out that there would be twice as many acid molecules.

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

    Molecules get their energy from being heated at high temperatures. What the energy does to the molecule is it breaks the various bonds the molecules have together. Molecules are attracted to each other by bonds and the energy breaks up these attractions to other molecules thus allowing the molecule to

  2. Find out how the concentration of the reactants affects the rate of reaction between ...

    Light This can affect the reaction rate by shining light on the acid, which will radiate heat to the molecules in the acid so that they are given the activation energy to react with each other. A good example of light being used for reactivity is in a plant where light is needed for photosynthesis so they can reproduce.

  1. Rate of Reaction - Sodium Thiosulphate and Hydrochloric Acid Coursework

    It would also be preferable to wear a scientific apron, however this is not essential. We should also try our best not to spill any chemicals, and we must not eat or drink in the lab while dealing with these harmful chemicals, as they can get on to our hands.

  2. An Investigation: Factors That Affect The Rate Of Reaction between Calcium carbonate and Hydrochloric ...

    Measure the hydrochloric acid with a measuring cylinder. 5. Pour the acid into the chronicle flask 6. Weigh out the calcium carbonate with the electronic balance 7. Pour the calcium carbonate into the chronicle flask 8. Place the bung on straight away, and start the digital stop watch 9.

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