Ferrous-sulphate sentence example

ferrous-sulphate
  • The aqueous solution is turned bluish black by ferrous sulphate containing a ferric salt.
    0
    0
  • For example, positive iron combined with negative oxygen to form positive ferrous oxide; positive sulphur combined with negative oxygen to form negative sulphuric acid; positive ferrous oxide combined with negative sulphuric acid to form neutral ferrous sulphate.
    0
    0
  • Magnesium sulphate (orthorhombic) takes up ferrous sulphate (monoclinic) to the extent of 19%, forming isomorphous orthorhombic crystals; ferrous sulphate, on the other hand, takes up magnesium sulphate to the extent of 54% to form monoclinic crystals.
    0
    0
  • By plotting the specific volumes of these mixed crystals as ordinates, it is found that they fall on two lines, the upper corresponding to the orthorhombic crystals, the lower to the monoclinic. From this we may conclude that these salts are isodimorphous: the upper line represents isomorphous crystals of stable orthorhombic magnesium sulphate and unstable orthorhombic ferrous sulphate, the lower line isomor phous crystals of stable monoclinic ferrous sulphate and unstable monoclinic magnesium sulphate.
    0
    0
  • This solution is allowed to stand for some time (in order that any calcium sulphate and basic ferric sulphate may separate), and is then evaporated until ferrous sulphate crystallizes on cooling; it is then drawn off and evaporated until it attains a specific gravity of 1.40.
    0
    0
    Advertisement
  • The specific gravity of gold obtained by precipitation from solution by ferrous sulphate is from 19.55 to 20.72.
    0
    0
  • Or Gutzkow's method of precipitating the metal with ferrous sulphate may be employed.
    0
    0
  • It is abundant, for example, in the plastic clay of the Brown Coal formation at Littmitz, near Carlsbad, in Bohemia, at which place it has been extensively mined for the manufacture of sulphur and ferrous sulphate.
    0
    0
  • Potassium ferrocyanide, K 4 Fe(NC) 6, (yellow prussiate of potash), was first obtained by decomposing Prussian blue with caustic potash: Fe4[Fe(NC)6]3 + 12KHO = 3K 4 Fe(NC) 6 +4Fe(OH) 3; it may be also obtained by warming a solution of ferrous sulphate with an excess of potassium cyanide: FeS04-I-6KNC = K4Fe(NC)6+ K2S04.
    0
    0
  • 9474 (1892)] passes the gas (after freeing it from ammonia) through a solution of potassium carbonate containing ferric oxide or ferrous carbonate (actually ferrous sulphate and potassium carbonate) in suspension; the sulphuretted hydrogen in the gas probably converts the iron salts into ferrous sulphide which then, in the presence of the hydrocyanic acid in the gas, and the alkaline carbonate, forms the ferrocyanide, thus: FeS+6HCN+ 2K 2 CO 3 = K 4 Fe(NC) 6 + H 2 S + 2CO 2 + 2H 2 0.
    0
    0
    Advertisement
  • The potassium salt may be prepared by adding potassium cyanide to ferrous sulphate solution, the brown precipitate so formed being then heated with potassium nitrite: 5 KNC + 2 FeSO 4 = 2 K 2 SO 4 + KFe2(NC)5, 2 KFe 2 (NC) 5 + 2 KNO 2 = 2 FeO + 2 K2Fe(NC)5 NO.
    0
    0
  • By the reduction of ortho-nitrobenzaldehyde with ferrous sulphate and ammonia, ortho-aminobenzaldehyde is obtained.
    0
    0
  • Blue or Roman vitriol ' is copper sulphate; green vitriol, ferrous sulphate (copperas); white vitriol, zinc sulphate; and vitriol of Mars is a basic iron sulphate.
    0
    0
  • They may be recognized by the fact that on the addition of a solution of ferrous sulphate, followed by that of concentrated sulphuric acid (the mixture being kept quite cold), the ferrous sulphate solution becomes of a deep brown colour, owing to the reducing action of the ferrous sulphate on the nitric acid which is liberated by the action of the sulphuric acid on the nitrate.
    0
    0
  • Since then (1904) Miss Florence Durham has shown that if the skins of young or embryonic mammals (rats, rabbits and guinea-pigs) be ground up and extracted in water, and the expressed juice be then incubated with solid tyrosin for twentyfour hours, with the addition of a very small amount of ferrous sulphate to act as an activator, a pigmentary substance is thrown down.
    0
    0
    Advertisement
  • Jeweller's rouge for polishing plate is a fine red iron oxide prepared by calcination from ferrous sulphate (green vitriol).
    0
    0
  • The bark possesses tanning properties, and in Scotland in past times yielded with ferrous sulphate a black dye for wool.
    0
    0
  • Iodine, antimony trichloride, molybdenum pentachloride, ferric chloride, ferric oxide, antimony, tin, stannic oxide and ferrous sulphate have all been used as chlorine carriers.
    0
    0
  • Ferrous chloride is not much used; the Douglas-Hunt process uses a mixture of salt and ferrous sulphate which involves the formation of ferrous chloride, and the new Douglas-Hunt process employs sulphuric acid in which ferrous chloride is added after leaching.
    0
    0
  • In the original form of the Douglas-Hunt process, ferrous chloride was formed by the interaction of sodium chloride (common salt) with ferrous sulphate (green vitriol), the sodium sulphate formed at the same time being removed by crystallization.
    0
    0
    Advertisement
  • Calcination with ferrous sulphate converts all the copper sulphide into sulphate.
    0
    0
  • It should be observed that the free acid is gradually neutralized, partly by chemical action on certain constituents of the slime, partly by local action between different metals of the anode, both of which effect solution independently of the current, and partly by the peroxidation (or aeration) of ferrous sulphate formed from the iron in the anode.
    0
    0
  • Pure Oxalic Acid May Also Be Used, Which, In The Presence Of Sulphuric Acid, Is Oxidized By The Standard Solution According To The Reaction: 5(H2C2042H20) 3H 2 So 4 2Kmn04 =10002 2Mns04 K2S04 18H20 The Reaction In Case Of Ferrous Sulphate Is: 10Fes04 2Kmn04 8H2S04 = 5Fe2(S04)3 K2S04 2Mns04 8H20; That Is, The Same Amount Of Potassium Permanganate Is Required To Oxidize 5 Molecules Of Oxalic Acid That Is Necessary To Oxidize I O Molecules Of Iron In The Form Of Ferrous Sulphate To Ferric Sulphate, Or 63 Parts By Weight Of Oxalic Acid Equal 56 Parts By Weight Of Metallic Iron.
    0
    0
  • Ammonium Ferrous Sulphate May Also Be Used; It Contains One Seventh Of Its Weight Of Iron.
    0
    0
  • The acid so obtained from ferrous sulphate (green vitriol) fumes strongly in moist air, hence its name "fuming sulphuric acid"; another name for the same product is "Nordhausen sulphuric acid," on account of the long-continued practice of this process at Nordhausen.
    0
    0
    Advertisement
  • It is manufactured by piling pyrites in heaps and exposing to atmospheric oxidation, the ferrous sulphate thus formed being dissolved in water, and the solution run into tanks, where any sulphuric acid which may be formed is decomposed by adding scrap iron.
    0
    0
  • The monohydrate also results as a white precipitate when concentrated sulphuric acid is added to a saturated solution of ferrous sulphate.
    0
    0
  • Ferric sulphate, Fe2(S04)3, is obtained by adding nitric acid to a hot solution of ferrous sulphate containing sulphuric acid, colourless crystals being deposited on evaporating the solution.
    0
    0
  • Ferrous nitrate, Fe(NO3)2.6H2O, is a very unstable salt, and is obtained by mixing solutions of ferrous sulphate and barium nitrate, filtering, and crystallizing in a vacuum over sulphuric acid.
    0
    0
  • Complicated compounds, discovered by Roussin in 1858, are obtained by the interaction of ferrous sulphate and alkaline nitrites and sulphides.
    0
    0
    Advertisement
  • It may be obtained artificially as a white precipitate, which rapidly turns blue or green on exposure, by mixing solutions of ferrous sulphate and sodium phosphate.
    0
    0
  • Ferrous carbonate, FeCO3, or spathic iron ore, may be obtained as microscopic rhombohedra by adding sodium bicarbonate to ferrous sulphate and heating to 150° for 36 hours.
    0
    0
  • Ferri sulphas exsiccatus, which has two subpreparations: (a) Pilula ferri, " Blaud's pill " (exsiccated ferrous sulphate 150, exsiccated sodium carbonate 95, gum acacia 50, tragacanth 15, glycerin 10, syrup 150, water 20, each to contain about I grain of ferrous carbonate); (b) Pilula aloes et ferri (Barbadoes aloes 2, exsiccated ferrous sulphate I, compound powder of cinnamon 3, syrup of glucose 3).
    0
    0
  • Jeweller's rouge for polishing plate is a fine red iron oxide prepared by calcination from ferrous sulphate (green vitriol) .
    0
    0
  • In many cases it is found that hydrogen peroxide will only act as an oxidant when in the presence of a catalyst; for example, formic, glygollic, lactic, tartaric, malic, benzoic and other organic acids are readily oxidized in the presence of ferrous sulphate (H.
    0
    0
    Advertisement
  • Chiozza, Ann., 1852, 83, p. 118) or with ferrous sulphate and baryta, and kynurine (-y-oxyquinoline), which is obtained by the action of nitrous acid on y-aminoquinoline (A.
    0
    0
  • Ferrous carbonate, FeCO3, or spathic iron ore, may be obtained as microscopic rhombohedra by adding sodium bicarbonate to ferrous sulphate and heating to 150° for 36 hours.
    0
    0
  • Ferri sulphas, ferrous sulphate, from which is prepared Mistura ferri composite, " Griffiths' mixture," containing ferrous sulphate 25 gr., potassium carbonate 30 gr., myrrh 60 gr., sugar 60 gr., spirit of nutmeg 50 m., rose water 10 fl.
    0
    0