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

To investigate the rate of reaction between Sodium Thiosulphate (-Na - _2 S_(2 ) O_3) and Hydrochloric acid (HCl)?

Free essay example:

To investigate the rate of reaction between Sodium Thiosulphate (image00.pngimage00.png and Hydrochloric acid (HCl)?

Introduction:

To investigate the rate of reaction between Sodium Thiosulphate and Hydrochloric acid. I predict that the temperature will play a big role in the experiment because when the water is heated or the temperature is raised the reaction will happen quicker, on the other hand I believe that if the concentration is low then the reaction will be slow. Also the particle theory shows us that when the temperature is high the particles move around much faster therefore the rate of reaction increases hence the rate of reaction depends on things such as temperature, concentration of chemicals and the surface area of the reactant. I will be doing this investigation in many different ways such as varying the temperature or the concentration of the hydrochloric acid and also I will use a calorimeter which will give me an accurate reading of how much light is absorbed and when the solution has turned cloudy and no light can transmit through it.

This is the word equation for this reaction:

Sodium Thiosulphate

+

Hydrochloric Acid

image01.jpg

Sulphur Dioxide

+

Sulphur

+

Water

+

Sodium Chloride

The reaction can also be expressed as a symbol equation:

Na2S20 3 + 2HCl image01.jpgSO2 + S + H20 + 2NaCl

Apparatus:

  1. 2 Measuring cylinders
  2. Hydrochloric acid
  3. Sodium Thiosulphate
  4. Distilled water
  5. Piece of paper
  6. Pen
  7. Stopwatch
  8. 2 Test tubes
  9. Calorimeter
  10. Cuvette
  11. Water bath

        Paper with X on it        

Distilled water        Sodium Thio-                2 measuring

        Sulphate                cylinders

        HCl

Method:

  1. Firstly collect all the equipment listed.
  2. Then following the table fill up each measuring cylinders with the amount of substance needed.
  3. Label each cylinder with the name of the substance you first put in it.
  4. Put the chemicals for the time being in a place that will keep the substances at their same temperature.
  5. Then pour the Sodium Thiosulphate into the measuring cylinder.
  6. Then follow that up by pouring both the HCl and distilled water (if any) at the same time into the cylinder.
  7. As soon as you pour them into the measuring cylinder then pour them in the test tubes and start the stopwatch.
  8. Keep on observing the test tube until you cannot see the X.
  9. As soon as you can’t see the X stop the stopwatch.
  10. Record the time you get and carry on the experiment.
  11. Once you have got a full table of results draw a graph and repeat the whole experiment again.

Safety:

To make sure that me and my team carry out my experiment safely I will wear firstly goggles throughout the experiment as that is Miss Essiens golden rule. We will keep the equipment safe by elected a team member to protect the equipment so that nothing will break. I will also make sure that the surroundings I am working in are clear. For example, I will move any bags, coats or books out of the way hence I will wash my hand before I make any contact with the equipment and also wash my hands after the experiment has finished.

Fair Test:

To make my experiment a fair test for each of my solution I had to keep 10ML of Thiosulphate and also when I repeated the test I had to keep the concentrations the same. To make it a fair test I made sure I washed all my equipment with distilled water so that when I repeated the experiment I knew how much I was using.

Preliminary test

In the preliminary we did the experiment at room temperature which is (36-37 degrees) starting at a concentration of 1M. We had to measure out 10ML of Sodium Thiosulphate and 10ML of Hydrochloric Acid. We then poured the Hydrochloric Acid in to the Thiosulphate and then timed how long it takes for the solution to turn cloudy on the X. We did the preliminary so that we know what to do in the upcoming experiments such as the one where the room temperature varies.

This student written piece of work is one of many that can be found in our GCSE Aqueous Chemistry section.

(?)
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

Related GCSE Science Skills and Knowledge Essays

See our best 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. Investigating the effect of changing temperature on the rate of reaction between sodium thiosulphate ...

    Method Evaluation - In getting prepared for the investigation was easy but it was hard to get every measurement so exact. I think my investigation was a success in that I got the results I expected. To be more exact I could have been more efficient on stopping the stopwatch at the exact time the cross disappeared.

  1. Investigating the rates of reaction with temperature - Sodium Thiosulphate (Na2S2O3) & Hydrochloric Acid ...

    As I predicted, when the temperature of the Sodium Thiosulphate, water & hydrochloric acid are increased the rate of the reaction increases. The graph shows this pattern taking place as well. From these results we now know that this reaction was a chemical reaction, because it cant be changed back

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

    It is hard to control the room temperature so nothing could be done about it. However some of my results were calculated using my line of best fit, I used my line of best fit to calculate the rate of reaction for the 0.01M, 0.02M and 0.015M concentrations of sodium

  1. The action of amylase and pectinase in varying amounts when clarifying cloudy apple juice.

    I decided not to continue using 50:50 water-apple juice solutions because it did not seem to make a huge difference except that they started off clearer. I decided that at room temperature I was not getting the results I needed.

  2. An Investigation Into The Rate Of Reaction Between Sodium Thiosulphate and Hydrochloric Acid.

    Bulb Distance between beaker and light sensor Prediction I believe that in my investigation, the more acid there is (the more concentrated the acid is) in a solution then the quicker the reaction will be. Rates of reaction all centres on collisions.

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