Neutralise carefully to litmus paper by the successive additions of small quantities of decinormal soda solution.
In one case, for example, decinormal solutions of potassium carbonate and potassium bichromate were used.
decinormal sulphuric acid contained in the receiver takes up the ammonia which distils over.
Mercurous Salts may be titrated with great accuracy by a decinormal solution of sodic chloride.
Note the amount of decinormal soda solution used in the process.
The mixture is then cooled, acidified by means of sulphuric acid, and titrated with decinormal sodium thiosulphate solution.
Meanwhile the acidity of the aqueous filtrate and washings is estimated by decinormal soda solution.
It is one of the “strong” acids, being ionized to the extent of about 91.4% in decinormal solution.
The acid still remaining free after the completion of the distillation is titrated with decinormal caustic soda.
It is then titrated with decinormal silver nitrate till a drop of the solution is turned brown with neutral chromate.