Can any one explain in detail how to prepare the K2S4O6 aqueous solution and how to acidify with H2SO4 to pH 2 ?

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Carlos Araújo Queiroz

Potassium tetrathionate (aq. sol.) could be expected to react with added sulfuric acid (aq. sol.) to generate tetrathionic acid and potassium sulfate: K2S4O6 + H2SO4 ⇌ H2S4O6 + K2SO4. Both H2S4O6 and (excess) H2SO4 should then contribute for acidic pH.

M. Newishy

OK, I need to make 3% K2S4O6 with pH 2, what will be the amount of H2SO4 required?

Anita Toppo

Sir,

Can you suggest what should be the concentration of acids (K2S4O6 and H2SO4) to be used for preparation of polythionic acid.