Please check for seemingly possible erroneous concentration indication; perhaps the mentioned molarity should instead correspond to that of the solvent solution used to dissolve the intended mercury salt (rather than pure water); such as H2SO4 1M solution, K2SO4 1 M aq. sol., if not a mixed H2SO4 + K2SO4 aq. sol. (e.g. 1 M in sulfate anion or 1M in both free acid and salt).

Carlos Araújo Queiroz Thank you

Hello

mercury sulfate is soluble in nitric acid. You can dissolve it in a very small amount of nitric acid (4.9724g of HgSO4) then complete to 10 ml with water.