Rate of Reaction - Sodium Thiosulphate and Hydrochloric Acid Essay

Rate Of Reaction Sodium Thiosulphate And Hydrochloric Acid Essay

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Investigating the rate of reaction between Sodium Thiosulphate and Hydrochloric Acid
Investigating the rate of reaction between Sodium Thiosulphate and Hydrochloric Acid Diagram Aim : We did 4 experiments to find out how the rate of reaction changes with differing ...
I am going to investigate the effect of varying the concentration of Sodium Thiosulphate solution in a reaction with Hydrochloric Acid. The theory behind this experiment is that ‘Increasing the concentration can increase the rate of the reaction by increasing the rate of molecular collisions.’

  I chose this reaction because it has a definite end point (when the cross disappears on the paper). The equation for the reaction is:

Sodium Thiosulphate + Hydrochloric Acid    È   Sodium Chloride + Water +

Investigation to find out how the rate of reaction between sodium thiosulphate and hydrochloric acid
Investigation to find out how the rate of reaction between sodium thiosulphate and hydrochloric acid is affected by changing the concentration align=left>Introduction align=left>In this experiment I am going to ...
Sulphur + Sulphur dioxide


Na  S  O  (aq) + 2HCL  (aq) È  2 Na Cl (aq)  + H  O (l) + S (s) + SO  (g)




·         ;2 Measuring cylinders

·         ;Conical flask

·         ;Beaker

·         ;Stopwatch

·         ;Paper with cross marked on it

·         ;Sodium Thiosulphate solution

·         ;Hydrochloric Acid

·         ;Water

·         ;Pipette


I predict that the greater the concentration of Sodium Thiosulphate solution the faster the chemical reaction will take place. Therefore, the cross

Concentration of acid Vs. rate of reaction of sodium thiosulphate and hydrochloric acid?
PLANNING: Introduction: The rate of a reaction is defined as the speed at which the reaction takes place. Many things can affect the rate of reaction. In this coursework ...
will disappear more quickly due to the cloudiness of the solution.

    I think that the concentration of a solution effects the rate of reaction because ‘the rate of reaction depends on how frequently the molecules of the reacting substances collide. A more concentrated substance has more molecules for a given volume than a more dilute substance. Because there are more molecules about, the frequency of successful collisions is greater, and the reactions happen faster.’


To conduct my experiment

Sodium Thiosulphate and Rate of Reaction
As the concentration of sodium thiosulphate is increased,I predict that the rate of reaction will also increase. I think this because as the  sodium thiosulphate concentration is increased it will ...
safely I will follow normal laboratory rules, which include:

·       ;The wearing of safety goggles to protect my eyes from chemical splashes.

·       ;Standing up to conduct the experiment, therefore reducing the risk of tripping and spilling chemicals.

·       ;Taking care when handling chemicals, particularly Hydrochloric acid and Sodium Thiosulphate because they are irritants. I will not touch my eyes or mouth until I have thoroughly washed my hands.

·       ;Taking care when using glassware to prevent injury.

Variable Control


Rate of reaction
Introduction I will be conducting an experiment on the rate of reaction for my GCSE coursework. I will be doing this coursework for a period of two weeks. We will ...
make this experiment a fair test I will only vary one thing – the concentration of the Sodium Thiosulphate solution. I will conduct all the tests at room temperature because temperature has an effect on the rate of the reaction. The measures of Hydrochloric acid will all be the same (10cm). The person timing the experiment will look for the disappearance of the cross, otherwise there would be a time lapse between seeing the cross disappear and telling the other
How Temperature can Affect the Rate of Reaction
The Problem: I am going to find out how temperature can affect the rate of reaction.Background information:Factors that change the rates of reactions are: · Temperature – an ...
person to stop the clock and then eventually stopping the clock.


I am going to pour 50cm  of Sodium Thiosulphate or Na  S  O   into 10cm  of Hydrochloric Acid or HCL in a conical flask. The concentration of the sodium Thiosulphate is 40g per litre and the concentration

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