Essay On The Effect Of Hydrochloric Acid On Chemical Reaction

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Research Question
How does the increase of concentrated hydrochloric acid affect the rate of the chemical reaction with sodium thiosulphate?

Background to the Research question
Chemical reaction involves the chemical change of atoms and molecules, it will occur when two or more molecules interact with each other and the molecule will change. Thus, bonds between atoms are broken down and then new molecules are formed.

Hydrochloric Acid and Sodium thiosulfate are both colourless and clear liquids, and they will react together to the equation below:
〖Na〗_2 S_2 O_3 (aq)+ 2HCl(aq)→2NaCl(s)+〖SO〗_2+ S+ H_2 O(I)
Sodium Thiosulfate + Hydrochloric Acid -> Sodium Chloride + Sulphur Dioxide + Sulphur + Water

The above solution of hydrochloric acid
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Talking about surface area, a larger surface area will give more collisions, which will increase the rate of reaction.

The rate of reaction could also be affected by the temperature of the chemicals, this is because that if the temperature of the chemicals increase, the reactant particles will eventually move quicker, and that there will be more energy, which particles will then collide more often, and that the average kinetic energy of the particles will increase as well, leading to an increase of the rate of reaction. Therefore it is very important to let this variable to stay constant in the experiment.

Concentration is one crucial part to the experiment. If there is more substance in that mixture, there will be a greater chance that molecules will collide, resulting to speed up the reaction. Alternatively, if there are fewer substances in the mixture, there will be less collision between the molecules, which will slow down the reaction. This is because that Therefore, concentration of the chemicals such as hydrochloric acid, will highly affect the rate of

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