Show nitric acid nd tin in paper read before the london chemical society by walker on tho action of nitric acid on tin como of alie prevalent ideas on that subject are shown to be singularly erroneous among these la the general supposition that metal llo tin dissolves in acid with the production of both a et annona and stannic salt according to tho conditions of temperature and concentration of the acid in these later experiments made to determine tho amounts of f Bt annona salts formed under various con 5 kitiona of temperature concentration of acid and mass of tin treated it is shown i with dilute acids the increase of 1 temperature haa but little effect but with more concentrated acids the effect is more marked for the alteration of a few more degrees will reduce the amount of etan noua calt to nothing while increase of concentration other things being equal decreases the proportion of stannous salt it is found that the yellowish white substance formed from concentrated cent rated solutions is a stanzio nitrate of varying composition depending on the time between production and analysis also on the method of purification adopted for eliminating tho nitric acid new york sun |