MR. G-. GORE OX HTDROELU ORIC ACID. 
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chlorochromic acid would not mix with the acid. With concentrated nitric and sul- 
phuric acids the acid mixed quietly, but with strong hydrochloric acid it produced active 
effervescence. With lime, baryta, strontia, and the hydrates of soda and potash it united 
powerfully, and with magnesia less strongly. No effect occurred with the peroxides of 
silver, iron, lead, thallium, or manganese ; nor with the suboxide or protoxide of copper, 
the oxides of nickel, cobalt, tin (both oxides), or cerium. Teroxide of antimony, bis- 
muth, and the oxides of silver, glucinum, and lanthanum produced strong chemical 
action, but did not dissolve. The oxides of mercury (both) and lead (both) were 
changed to fluorides, and apparently also were oxide of zinc and peroxide of barium, the 
latter with most violent action (probably water was present). Binoxide of platinum was 
slightly dissolved, and the oxides of uranium and chromium freely ; chemical changes also 
occurred with the lower oxides of vanadium and titanium, and with alumina. The 
nitrates of lead, uranium, strontium, and barium exhibited no strong chemical action, 
and did not dissolve, but signs of free nitric acid appeared ; nitrate of silver was unaf- 
fected ( 1 ), nitrate of potassium dissolved freely with a hissing sound ; nitric acid was found, 
by suitable tests, to be set free with the nitrates of lead, barium, and potassium. The 
fluorides of antimony, bismuth, mercury, copper, nickel, cobalt, iron, lead, tin (both), 
cadmium, zinc, manganese, cerium, aluminium, magnesium, and calcium were either 
slightly or not at all affected, and did not dissolve ; the fluorides of uranium and chromium 
exhibited chemical change and dissolved. Alkaline fluorides were strongly affected; 
the fluorides of silver, barium, and lithium, also cryolite, hissed strongly but did not 
dissolve ; and those of thallium, strontium, sodium, potassium, rubidium, and ammonium 
produced different degrees of violent chemical action and solution ; the acid fluoride of 
potassium also produced strong action and solution : the behaviour of the alkaline fluo- 
rides with the anhydrous acid may be compared to that of the alkaline oxides and 
hydrates with water. Solid terchloride of carbon, and the chlorides of silver, mercury 
(both), copper, nickel, cobalt, lead, cadmium, manganese, and the violet sesquichloride 
of chromium were undissolved and unaffected ; the liquid tetrachloride of carbon, and the 
liquid chlorides of sulphur, phosphorus, arsenic, and tin would not mix with the acid, 
whilst the liquid perchloride of antimony and tetrachloride of titanium were decomposed 
with violent action and formation of deliquescent solid residues, as when water is added 
to them ; the solid perchloride of phosphorus was also violently decomposed and a white 
powder formed; the chlorides of calcium, barium, lithium, sodium, potassium, and am- 
monium were decomposed with strong action and effervescence, the latter four with 
solution and especially strong action. The chlorates of sodium and potassium were 
rapidly decomposed with evolution of yellow fumes of peroxide of chlorine ; no visible 
effect occurred with the chlorate of barium or perchlorate of potassium. Terbromide of 
antimony turned white, as on addition of water, and did not dissolve ; the bromides of zinc 
and cadmium were but little affected ; the bromides of calcium, barium, and potassium 
were decomposed with strong effervescence, and the latter bromide dissolved ; bromate 
of potassium was also rapidly decomposed with copious liberation of bromine. The ter- 
