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- 31. A sample of meat scrap weighing 2.000 g is digested with concentrated H2SO4 and a catalyat. The resulting solution is made alkaline with NaOH and the liberated ammonia distilled into a 50.0 mL of 0.6700 N H2SO4. The excess then requires 30.10 mL of 0.06520 N NaOH for neutralization. What is the percentage of nitrogen in the meat?Ligand A binds to protein P with a dissociation constant, Kd = 1.5 uM.(a) What concentration of A is required in order for half of P to be bound?Use the equation: [PA]/ PTot = [A]/ Kd+[A] b)What concentration of A is required for 90% of P to be bound?A solution of sodium thiosulfate, Na2S2O3 was standardized by dissolving 0.188 g of KIO3 (MM = 214.00) in water, adding a large excess of KI, and acidifying with HCl. The liberated iodine required 18.25 mL of the thiosulfate solution to decolorize the blue starch/iodine complex. Calculate the molarity of Na2S2O3 solution. Stoichiometry of the reaction is: 1 mol IO3- = 3 mol I2 = 6 mol S2O32-
- Calculate the Ksp for Li3PO4 if at equilibrium the concentration of PO43− ion is 3.30 × 10−3 M.Cadmium is an interferant because it forms a precipitate with o-phenanthroline. What effect would the formation of a Cd-o-phenanthroline precipitate have on thedetermination of the parts per million of Fe in a sample?A solution of sodium thiosulfate was standardized by dissolving 0.1210 g KIO3 (MM=214) in water, adding a large excess of KI, and acidifying with HCI. The liberated iodine required 41.64 mL of the thiosulfate to decolorize the starch/iodine complex. Calculate the molarity of the Na₂S₂O3. 0.0721 M 0.239 M 0.1234 M 0.0815 M
- Protein X binds to Ligand W with a dissociation constant of .15 μmol. what is the concentration of W 75% of the protein is free (ie, unbound)?"Give out preparations of arena n6 complexesIf the concentration of PB2+, is found to be 1.3*10^-9mol/L in a saturated solution of Pb3(PO4)2, what is the ksp of Pb3(PO4)2?
- draw the electronic configuration of platinium II in carboplatine (complex and expect the followings: a. the charge of this drug b. the shape of its complex. c. the expected type of hybridization d. the number of coordination covalent bonds in this drug e. what is the pharmacological use of itWhat is the reaction resulting from the addition of SnCl2(aq) to a solution containing Bi3+ in a basic solution?Given A, B, and C… [A] U(VI) as uraninite; UO2 (where Fe2+= reductant; Fe(OH)3 ferrihydrite= product): 2Fe2+ + UO22+ +3H2O + H+ ---- > 2Fe(OH)3 + U4+ +2H2O [B] U(VI) as uraninite; UO2 (where Mn2+= reductant; MnO2 pyrolusite= product): 2H2O + UO22+ + Mn2+ ---- > UO2 + B - MnO2 + 4H+ [C] U(VI) as as uraninite; UO2 (where HS-= reductant; S0= product): UO22+ + Hs- ---- > UO2 + S + H+ QUESTION: Use thermodynamic calculations [use redox potential (Eh)] to predict which of the three reductants below is most favorable at pH 3 ? (1) Fe2+ (2) Mn2+ (3) HS-