The Rate of Reaction Between Sodium Thiosulphate and Hydrochloric Acid

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The rate of reaction between sodium thiosulphate and hydrochloric acid Candidate name: Yeo Jin Kim (Kimberly Kim)
Candidate number: 000791-021
Teacher: Yitao Duan

1.0 Aim
The aim of this experiment is to investigate the changing of concentration effect the rate of reaction between sodium thiosulphate and hydrochloride. 2.1 Chemical Equation

2.0 Raw data
3.2 Qualitative Data
2.1.1 Before the experiment
Substance| Color| State| Smell|
Hydrochloride (HCl)| Colorless| Liquid| Weak sour smell| Sodium Thiosulphate (Na2S2O3)| Colorless| Liquid| None| Water| Colorless| Liquid| None|

2.1.2 During the experiment (When Sodium Thiosulphate did not react with Hydrochloride) Substance| Color| State|
Mixture| colorless| Liquid|

2.1.2 After the experiment (When Sodium Thiosulphate react with Hydrochloride) Substance| Color| State| Comment|
Mixture| Cloudy with white solid| Liquid| When the reaction occur, there will be a new product which is S(s). |

3.3 Quantitative Data
Table 1- This table shows the quantitative data of length of time taken for different concentration of sodium thiosulphate with hydrochloride to finish reaction

Volume of Na2S2O3 (cm3)| Volume of Water(cm3)| Volume of Water(cm3)| Trial 1(s)| Trial 2(s)| Trial 3(s)| 10| 40| 10| 190| 193| 195|
20| 30| 10| 82| 85| 86|
30| 20| 10| 68| 70| 71|
40| 10| 10| 38| 39| 39|
50| 0| 10| 31| 32| 30|

3.0 Processing raw data
3.1.1 Table 2- this table shows the average time taken for the reaction Volume of Na2S2O3 (cm3)(±0.5 ml)| Volume of Water (cm3)(±0.5 ml)| Volume of Water(cm3)(±0.5 ml)| Trial 1(s)| Trial 2(s)| Trial 3(s)| Average of time(s)| 10| 40| 10| 190| 193| 195| 192.67|

20| 30| 10| 82| 85| 86| 84.3|
30| 20| 10| 68| 70| 71| 69.67|
40| 10| 10| 38| 39| 39| 38.67|
50| 0| 10| 31| 32| 30| 31|

3.2.1 Table 3- this table shows the concentration of each mixture of Sodium thoisulphate and hydrochloride. Volume of Na2S2O3 (cm3)(±0.5 ml)| Volume of Water(cm3)(±0.5 ml)| Volume of Water(cm3)(±0.5 ml)| Concentration | 10| 40| 10| 2|

20| 30| 10| 8|
30| 20| 10| 18|
40| 10| 10| 32|
50| 0| 10| 50|

3.2.2 Calculation of concentration
With 50cm³ of Na2S2O3, 50cm³ = 50*50/50 = 50
With 40cm³ of Na2S2O3, 40 cm³ = 40*40/50 = 32
With 30cm³ of Na2S2O3, 30 cm³= 30*30/50 = 18
With 20cm³ of Na2S2O3, 20 cm³= 20*20/50 = 8
With 10cm³ of Na2S2O3, 10 cm³= 10*10/50 = 2

3.3.1 Table 4- This table shows the rate of reaction of each mixture of Sodium thoisulphate and hydrochloride. Volume of Na2S2O3 (cm3)(±0.5 ml)| Volume of Water(cm3)(±0.5 ml)| Volume of Water(cm3)(±0.5 ml)| Rate of reaction| 10| 40| 10| 0.0104|

20| 30| 10| 0.0949|
30| 20| 10| 0.258|
40| 10| 10| 0.828|
50| 0| 10| 1.61|

3.3.2 Calculation of rate of reaction
Rate of reaction = concentration/ time (average of three trial) With 50cm³ of Na2S2O3, 50/31=1.61
With 40cm³ of Na2S2O3, 32/38.67=0.826
With 30cm³ of Na2S2O3, 18/69.67=0.258
With 20cm³ of Na2S2O3, 8/84.3=0.0949
With 10cm³ of Na2S2O3, 10 2/192.67=0.0104

3.4 Table 5- this table shows much more processed date of both concentration and the rate of reaction of each mixture of Sodium thiosulphate and hydrochloride. Volume of Na2S2O3 (cm3)(±0.5ml)| Volume of Water (cm3)(±0.5ml)| Volume of Water (cm3)(±0.5ml)| Average of time (s)| Concentration| Rate of reaction| 10| 40| 10| 192.67| 2| 0.0104|

20| 30| 10| 84.3| 8| 0.0949|
30| 20| 10| 69.67| 18| 0.258|
40| 10| 10| 38.67| 32| 0.828|
50| 0| 10| 31| 50| 1.61|

4.0 Data presentation
4.1 Graph 1- This graph shows the average time taken for each concentration of sodium thiosulphate to complete the reaction with hydrochloride. The X-axis is concentration in dm-3 sec-1, and the y-axis is average time taken of three...
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