sodium thiosulphate

noun

a white soluble substance used, in the pentahydrate form, in photography as a fixer to dissolve unchanged silver halides and also to remove excess chlorine from chlorinated water. Formula: Na 2 S 2 O 3 Also called (not in technical usage)sodium hyposulphitehypo

The mixture is then cooled, acidified by means of sulphuric acid, and titrated with decinormal sodium thiosulphate solution.

Sodium thiosulphate is familiar as sodium hyposulphite, the hypo of the photographers.

This is done by immersing the plate in a solution of sodium thiosulphate (hypo).

Direct titration with sodium thiosulphate solution indicated the presence of 1.68 per cent.

The liberated iodin was extracted with chloroform and titrated with tenth-normal sodium thiosulphate.

April 23, 2024inveterate

[in-vet-er-it ]

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