Sulfuric acid formula weight

If R is foe burette reading, W is the weight of acid in 100ml of soln, NF is the normal factor of the NaOH soln, 49.043 is the equivalent weight of H Da(1A of mol wt),. then the percentage of sulfuric acid as HaS04 is determined by the following formula ... 

Dissolve 100 g. of commercial ferrous sulfate (copperas) in 400 cc. of hot water to which has been added 1 or 2 cc. of sulfuric acid and then add an equimolecular weight of ammonium sulfate, remembering that the formula for ferrous sulfate is FeS04-7H20. It is well to add a bright iron nail and keep the solution hot for a time to reduce any ferric sulfate which may be present. Bring... 

THTOPHENE. [CAS 110-02-1]. (CH C.H)2)S, formula weight 84.H, colorless liquid resembling benzene in odor, mp —30°C, bp 84°C. sp gr 1,070. Thiophene and its derivatives closely resemble benzene and its derivatives in physical ancl chemical properties. Thiophene is present in coal tar and is recovered in the benzene distillation fraction (up to about 0.5% of the benzene present). Its removal from benzene is accomplished by mixing with concentrated sulfuric acid, soluble thiophene sulfonic acid being formed. Thiophene gives a characteristic blue coloration with isatin in concentrated sulfuric add. 

The crude dicyanobis(2,2,-bipyridine)iron(II) can be purified by dissolving it in 25 ml. of concentrated sulfuric acid and diluting it slowly with 800 ml. of water while stirring. The recrystallized product is collected by suction filtration, washed with small portions of water until free of sulfuric acid, sucked dry, rinsed with acetone, and vacuum-dried at room temperature. The final yield is 3.5 g.f (75%). Anal. Calcd. for [Fe(C10H8N2)2(CN)2]-3H20 C, 55.71 H, 4.68 N, 17.72 H20, 11.4 formula weight, 474.3. Found C, 55.8 H, 4.84 N, 17.9 H20, 11.6 formula weight, 472. 

Determine the formula weight of each of the following common acids (a) hydrochloric acid, FICl (b) nitric acid, HNO3 (c) phosphoric acid, H3PO4 (d) sulfuric acid, H2SO4. 

Formula weight 346.85. Colorless, crystalline substance very hygroscopic. Hydrolyzes completely in water, with separation of a-stannic acid. Readily soluble in dilute sulfuric acid. 

Formula weight 269.11. Green Yb " ions are oxidized by water to Yb + (evolution of H3). Solubility in dilute sulfuric acid ... 

TiO Formula weight 127.80. Gtolden yellow powder. M.p. 1750°C d 4.89. Crystal structure type B1 (NaCl type). The rock salt phase is homogeneous over a wide range of compositions (TiOi g-TlOo.e). TIO dissolves in dilute hydrochloric and sulfuric acids with partial oxidation Tl + H+ = TI + Vs Hg. 

Formula weights LiUOa 293.0 NaUOa 309.1. LiUOa is dark violet, NaUOs brown-violet. Both are very stable. Much more resistant to acids than the corresponding uranates (VI). Dilute hydrochloric and sulfuric acids have no effect in the cold. Dissolve in dil. nitric acid. 

Formula weight 663.45. Grayish-black, lustrous prisms. Almost insoluble in cold dil. sulfuric acid more soluble at 50-60°C. 

The formula weight of a substance is the sum of the atomic weights of the atoms in the chemical formula of the substance. Using atomic weights, we find, for example, that the formula weight of sulfuric acid (H2SO4) is 98.1 amu ... 

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