Kinetics Study on the Reaction between Sodium Thiosulphate and Hydrochloric Acid - MeitY OLabs

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Kinetics Study on Sodium Thiosulphate and Hydrochloric Acid :-
The effect of concentration of the reactant on the rate of a reaction can be studied easily by the reaction between sodium thiosulphate and hydrochloric acid. Sodium thiosulphate reacts with dilute acid to produce sulphur dioxide, sulphur and water. Sulphur dioxide is a soluble gas and dissolves completely in aqueous solution. The sulphur formed however is insoluble and exist in the mixture as a white or pale yellow precipitate or a colloid that gives a milky appearance and makes the solution opaque. Therefore the rate of the reaction can be studied by monitoring the opaqueness of the reaction. This can be easily done by measuring the time taken (t) for forming a certain amount of sulphur.
This video explains how to study the effect of concentration on the rate of reaction between sodium thiosulphate and hydrochloric acid.