The reaction produce a yellow precipitate that covers the "PK2" mark under the conical flask. The time taken varies depends on the concentration of sodium thiosulphate solution used.

The rate of reaction is directly related to the concentration of the reactants. The higher the concentration of the reactants, the faster the reaction.

For example, Sulphur, S precipitated faster when more concentrated solution of sodium thiosulphate(VI) reacts with sulphuric acid.

The higher the number of molecules...
Continue reading ...