Investigate what happens to the rate of reaction when the concentration of Sodium Thiosulphate is altered in the reaction between Sodium
Thiosulphate and Hydrochloric acid.
Rates of reaction investigation
Aim
The aim of this coursework is to investigate what happens to the rate of reaction when the concentration of Sodium Thiosulphate is altered in the reaction between Sodium Thiosulphate and Hydrochloric acid.
Below is the reaction equation
Sodium + Hydrochloric Sodium + Water + Sulphur+ Sulphur
Thiosulphate acid Chloride Dioxide
Na2S2o3 (aq) + 2Hcl (aq) 2Nacl (aq) + H2o(l) + So2(g) S(s)
Prediction
I predict that as the concentration of Sodium Thiosulphate decreases, the reaction time will increase. The reason I believe this is because the collision theory says, that when there is a high concentration of
Sodium Thiosulphate, there are more particles of Sodium Thiosulphate floating around the water molecules, this increases the chance of collisions between the important particles so therefore it will take less time for the reaction to occur. Similarly, when there is a lesser concentration of Sodium Thiosulphate and a higher concentration of water, there are less particles of Sodium Thiosulphate floating around the water molecules, this decreases the chance of collisions between the important particles so therefore it will take more time for the reaction to occur.
Method
Equipment needed
* 1 Bottle of Sodium Thiosulphate
* 1 Bottle of Hydrochloric Acid
* Water
* 1 Beaker
* 2 pipettes
* 2 measuring cylinders
* Goggles
* Paper with "X" mark
* Stop clock
In order for me to carry out my experiments I would need to change the concentration of Sodium Thiosulphate in the reaction between Sodium
Thiosulphate and Hydrochloric Acid. I would do this by keeping the total volume of the reactant 50³ all the time. I would change the concentration of Sodium Thiosulphate by decreasing the volume of
Sodium Thiosulphate and increasing the volume of water in ten different experiments. In each of the experiments I would keep the amount of Hydrochloric acid the same and this would be 5cm³. Below is a table of how I would do this.
GRAPH
In order for me to get an accurate result, I am going to carry out these experiments three times. I will then work out the average result for all three and use that to create my graph which will tell me how the rate of reaction is affected by using different concentrations.
In order for me to carry out my experiments I would need to follow the following procedures:
1. Draw out an "X" on a paper and place it underneath the empty
How am I going to make it a fair test I will use a clean flask for
= I have decided to produce a step-by-step guide for each experiment. just to ensure that when we actually come to conducting the practical work, it runs flawlessly. This will also help us conduct fairer tests. as we will be following the same set of steps each time we collect a result.
Hydrochloric Acid, Sodium Thiosulphate Reaction. Research: What is the difference between Hydrochloric acid is a strong colourless acid formed when hydrogen chloride gas dissociates in water, used in industrial and laboratory. processes. The.
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Hcl. Under the conical flask I put a white piece of paper and put a
5. Add Hcl, as soon as it mixes with the ( ), start the stopwatch
The Reaction Between Sodium Thiosulphate and Hydrochloric Acid The Effect on the concentration on the reaction between Sodium Thiosulphate and Hydrochloric acid Our aim in this investigation is to find out how the concentration of Sodium Thiosulphate affects the rate at which it reacts with Hydrochloric acid. The equation for this reaction is Na2S2O3(aq) + 2HCl(aq) = 2NaCl(aq) + H2O(l) + SO2(g) + S(s) Ionic equation: 2H+(aq)
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My aim in this piece of work is to see the effect of temperature on the rate of a reaction in a solution of hydrochloric acid containing sodium thiosulphate.
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