• 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

# Investigate how changing the concentration of Hydrochloric acid affects the rate of reaction with Sodium Thiosulphate solution.

Extracts from this document...

Introduction

Science Coursework Aim I aim to investigate how changing the concentration of Hydrochloric acid affects the rate of reaction with Sodium Thiosulphate solution. Sodium + Hydrochloric Sodium + Water + Sulphur + Sulphur Thiosulphate Acid Chloride Dioxide (aq) (aq) (aq) (l) (g) (s) The reaction makes the solution go a yellow cloudy colour and a gas is given off. Procedure To ensure that our results are precise accurate and reliable we are going to take more than one set of results down and we will do the test twice. If there appears to be a set of results that does not fit the pattern we will repeat the test that it occurred in. We will also make sure that the apparatus we are using gives an accurate measurement. Also, in order to keep it a fair test, we will keep all of the variables the same, except from one. ...read more.

Middle

We will wash out the beaker that is used for the experiment each time a measurement is taken. To perform this experiment I will be using a HB pencil to draw a cross, I will place it under the beaker. The cross disappears as the product of the experiment is cloudy. Using a stopwatch I will measure how long it takes for the mix to go cloudy and then record it in a table of results. Prediction I predict that as the concentration of the sodium thiosulphate gets stronger the time the cross takes to disappear will decrease. This is because the particles are moving much quicker and are more densely populated making the collisions more likely. When the concentration is at its weakest, the time for the cross to disappear is at its highest. This means as it gets stronger; the time it takes for the cross to disappear will be less. ...read more.

Conclusion

This proves that my prediction of " the higher the concentration, the less amount of time taken to go cloudy" is correct. George Ives Also, from my results I can see that the higher the temperature the quicker the reaction takes place. To find this out we had to do the tests again when the room was hotter. Evaluation I feel that the evidence we have to prove the theory, the hotter the room temperature and the more concentrated the acid is the faster the reaction will take place, is reliable as we did the test twice and the results were very similar. Also the conditions of the test were the same apart from the room temperature. Improvements I feel that if we were to do the experiment again we should take down more results by doing the test maybe four or five times rather than two. I think that this will back up our theory even more. We could do it again with a different range of room temperatures to give even more proof of our theory. ...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

# Related GCSE Aqueous Chemistry essays

1. ## Investigating the effects of changing the concentration of different solutions on the refractive index ...

The magnification that I set was not sufficient enough. What this caused was that it gave a longer distance for the microscope to be moved and still got a clear image. This made the data collected inaccurate as I didn't define where actually I should have stopped so my results were not reliable.

2. ## Finding out how much acid there is in a solution.

very close as they only had a difference of 0.2cm3 between them. My results that were obtained from the titration show that the concentration of sulphuric acid is 0.09 mol dm-3 . This is not the exact value but, it still agrees with the original statement that the acid is

1. ## My Aim is to see how concentration of acid will affect the time it ...

4cm� 50cm� 10% 4cm� 6cm� 50cm� 6.6% 2cm� 2cm� 50cm� 3.3% Unlike an enzyme, Hydrochloric acid once it has reacted, it has been used up where as an enzyme can carry on working after it has broken down a certain particle.

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

A variable is anything in a chemical reaction that can be changed. These variables are * Surface area: if magnesium ribbon is put in to hydrochloric acid the acid can only react with the outer surface of the ribbon. The surface are available to react with the acid is small,

2. ## Investigating what affects the rate of reaction between sodium thiosulphate and hydrochloric acid

The displacement would hence occur at a faster speed and the products would be produced in a small amount of time. Apparatus * Conical flask * 2x measuring cylinder * 300ml of 0.1 Molar Hydrochloric acid * 500ml of 0.1 Molar Sodium thiosulphate * Paper * Black marker pen *

1. ## Investigation to find out how the rate of reaction between sodium thiosulphate and hydrochloric ...

Then, we put 10 cm3 of hydrochloric acid in a conical flask (measuring the HCL with a small meniscus), and then put the conical flask on the black cross on the paper. We then added 50 cm3 of sodium thiosulphate to the hydrochloric acid, and at this time we do not need to add any water.

2. ## Investigation to find out how the rate of reaction between sodium thiosulphate and hydrochloric ...

(We had to add the sodium thiosulphate and the water at the same time for this to be a fair test also). We then recorded the time for the cross to become completely obscured.

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