, by mixing them with carbonate of pot-ash, before sending them to this country. Nitric acid is prepared from the nitrate of potash or soda,by decomposing it with sulphuric acid. This may be done,on a small scale, by putting a Httle of any of these salts intoa retort, adding some sulphuric acid,… … At the beginning of this experiment, red fumes of peroxideof nitrogen come oflP; but soon after a colourless liquidis seen to distil over, and drop into the receiver—this isnitric acid. The reaction which takes place may be repre-sented by the following formula. Na NOe + SO4H = Na SO4 + NO^ H.…
Dyes and dyeing
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