Question

What happens when copper react with sodium thisulpahate?

Answer 1

Introduction:

Sodium thiosulfate [Na2S2O3·5H2O] dissolves in water to give thiosulfate ion (S2O32-), a useful reducing agent. Copper (II) sulfate [CuSO4·5H2O] dissolves to give cupric ion (Cu2+); in the context of a redox reaction with thiosulfate, the cupric ion acts as an oxidizing agent. The vivid color of Cu2+ makes it easy to see when it's been reduced by the thiosulfate; the blue cupric ion becomes the colorless cuprous ion.