# dil. hydrochloric acid is added to sodium thiosiulphate

Dear student,

When dilute hydrochloric acid is added to sodium thiosulphate, the solution turns cloudy due to the formation of yellow solid sulfur. It is a very good reaction to study the concept of kinetics and reaction rate.

Na2S2O3 + 2HCl $\stackrel{}{\to }$ 2NaCl + SO2 + S + H2O

Regards

• 0

Hope