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Rates of Reaction
Science Coursework
Rates of Reaction – Dilution of Sodium Thiosulphate
When Sodium Thiosulphate reacts with Hydrochloric Acid it gradually goes cloudy as it produces Sulphur in suspension. ...
Collision theory is to do with the rate of reaction, this is the time taken for the reaction to be completed. If there are fewer molecules then the reaction will take longer because there is less chance of the particles colliding. If there are more particles or in our case the concentration is is high then the reaction will take place faster because there are more chance of the particles colliding. ...
Obtain
Experiment num Re-test num Amount of acid Amount sodium Amount of water Time taken ( seconds ) Average time
1 1
2
3
4
5
10
10
10
10
10 30
30
30
30
30
0
0
0
0
0 43
43
43
42
44 43 sec
2 1
2
3
4
5 10
10
10
10
10 25
25
25
25
25
5
5
5
5
5 54
54
55
56
56 55 sec
3 1
2
3
4
5 10
10
10
10
10
20
20
20
20
20
10
10
10
10
10 66
66
66
66
66 66 sec
4 1
2
3
4
5 10
10
10
10
10
15
15
15
15
15
15
15
15
15
15
104
105
105
106
105 105 sec
5 1
2
3
4
5 10
10
10
10
10
10
10
10
10
10 20
20
20
20
20 243
245
241
243
243 243 sec
6 1
2
3
4
5
10
10
10
10
10 5
5
5
5
5 25
25
25
25
25 424
432
428
426
430 438 sec
Analysis
My graph goes up in a curve, this means that the reaction time was fast at first but as we kept diluting the sodium thiosulphate the reaction time slowed down, the graph goes up because it is taking longer time to react.
Approximate Word count = 1577
Approximate Pages = 6.3
(250 words per page double spaced)
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