A study of calorimetric methods together with a critical study of the peroxide calorimeter . lie constancy of tlie ?IIa202, . Prescott cjrA John-stonnew of theifwork on Quaiitcitive Analynis, the statcjlment is nado that lla202 i^Qi/ f^^ fused \7ith0ut deconpo?.ition, andthis assertion is home out in the present investigation. Theeffect of t .j-.^ .j.; of noisture in tlie Ha202 seened to have no oearing on the results. This fact r/as proven hy heatingthe peroxide in t]?.e cartridge in hciling v/atcr for ten minutes,and then preceding as usual with the conhustion. A part of t]ie
A study of calorimetric methods together with a critical study of the peroxide calorimeter . lie constancy of tlie ?IIa202, . Prescott cjrA John-stonnew of theifwork on Quaiitcitive Analynis, the statcjlment is nado that lla202 i^Qi/ f^^ fused \7ith0ut deconpo?.ition, andthis assertion is home out in the present investigation. Theeffect of t .j-.^ .j.; of noisture in tlie Ha202 seened to have no oearing on the results. This fact r/as proven hy heatingthe peroxide in t]?.e cartridge in hciling v/atcr for ten minutes,and then preceding as usual with the conhustion. A part of t]ie ahove deteminations lyerc made at con-stant pressure, -irA p?.rt at const^^nt volume. If there T7as anyvariable introduced oy the presence or absence of pressure, itY/as too snail to oe detected. In the use of tlic peroxide nethodwithout ar^ accelerator, thcr is no pressure, all the gases ho-i;ig ii!L:.ediately ahsorhed. This fact r/as proved by the use ofthe adaptation of Schiff s nitroneter Bho^.7n in the drairingopposite, and the method of use has already hcen referred Schiff!5 Nitrometeradapted for determination of PRESSURE -25- li It was at tliic point in the investigation tliat the of isnit-|,ing iDy nca^is of an electric current was adopted, and all of the a-bove cLctcnninationc were iiade witli the device. The modification j|is shorn on tlie next pace in the drawino* chanf:::e scened to produce no iiow variahle in the nethod. Testinfj of the other chenicaln in the course of the v/-ork the question of applyingannonium persulphate cane up , and tests were to see if |it was possihle. It ^-s found act in precisely the sane wayas the potassiun compound, no variable being introduced h:/ thepresence of nitroc^n which inight natv^rally he expected to o::^idir:ejat to none extent, to nitric acid# The residues of severalcoiUDUStions were tested oy the usual qualitative methods for hothnitrates and nitrites, but none
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttheses, bookyear1902
