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A mixture of sodium salts may enclose one or more of the anions studied in this experiment. All of the salts are readily as well as completely soluble in cold water. While silver nitrate is added to the solution, a precipitate forms. Explain what anions are shown to be conclusively present in the unknown solution? Explain what anions are shown to be the definitely absent? For which anions are the test inadequate to confirm their presence or absence? Anions cl-,I-,SO42-,CO32-,NO3-,PO42-
Convert the 5 mM fumaric acid in a waste stream into malate using fumarase immobilized on nonporous spherical particles. The enzyme has a turnover number of 23/sec, and a Km of 1.55 mM. The immobilized enzyme particles are 1 mm in diameter
Ethane is burned with 20% excess air in a furnace operating at a pressure of 100 kPa. Assume complete combustion occurs. Determine the dew point temperature of the flue gas.
A) Colloids are homogeneous solutions. B) A true colloidal particle will not settle out of the dispersing medium. C) Colloidal particles can usually pass through a semipermeable membrane.
the sodium acetate play in the synthesis of the amide functional group of phenacetin?
In the reaction MnO4? + 8H+ + 5e? = Mn2+ + 4H2O, the manganese in 3.95 grams of KMnO4 (M.W. 158.0) were reduced to Mn2+. How many coulombs of charge must have been transferred to the permanganate ion? A) 1.60 x 104 C B) 2.41 x 103 C C) 1.20 x 104 C
A current of 3.88 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 6.60 g of nickel
A 0.10-mole quantity of CuSO4 is added to a liter of 1.0 M NH3 solution. What is the concentration of Cu2+ at equilibrium. [The formation constant for Cu(NH3)42+ is Kf = 5.0 x 1013.]
Assuming electrons with quantum numbers (n,l,mt,ms), how does an electron with the quantum numbers (2,1,1+1/2) differ from an electron with quantum numbers (2,1,-1,+1/2)?
a solution is prepared by adding 50.0ml of 0.050m HBr to 150.0ml of 0.10m HI .calculate the concentrations of all species in this solution HBr and HI are both considered strong aicds ?
What is a by-product that could form from the condensation/elimination of 1,3-diphenylacetone in a reaction with benzil and a base catalyst? The major product is tetraphenylcyclopentadienone.
Five constituionally isomeric monochlorides of molecular formula c6h13cl are formed (along with a mixture of dichlorides, trichlorides, etc.) What is the most reasonable structure for the starting alkane? why?
Write balanced chemical equations and the solubility product expressions for the solubility equilibria of silver chloride and calcium phosphate.
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