arsenous acid

It is the sodium salt of arsenous acid.

And then you cook them up with nitre and you get arsenous acid, sir.

Arsenous acid is a colorless solution.

It reacts with water to make arsenous acid and hydrofluoric acid, both very dangerous acids.

'It could be arsenous acid, sir.

Hydrolysis with water gives arsenous acid and hydrochloric acid:

The reaction proceeds via formation of arsenous acid which exists in equilibrium with hydroiodic acid.

Unlike phosphorus acid, arsenous acid is genuinely tribasic, with the formula As(OH).

The H NMR spectrum of arsenous acid solutions consists of a single signal consistent with the molecule's high symmetry.

In 1833 Bunsen became a lecturer at Göttingen and began experimental studies of the (in)solubility of metal salts of arsenous acid.