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- Ksp for Co(OH)2 is 5.92x10^-15A membrane is made up of an alumina support (Al2O3) and a selective layer of a polymer called Naflón ® . State whether the membrane is organic, inorganic, or hybrid; symmetric or asymmetric.A piece of an unknown weighing 12.50is placed in 49.7cm of water in a cylinder. The water level increases to 69.0cm3. whats the calculated value for the drnsity of the solid in g ml-1
- One litre of a saturated aqueous solution of Ag2SO4 (MW = 311.79 g mol- 1) at 25 °C is evaporated to dryness. 4.844 g of Ag2SO4 residue was produced. What is the solubility product (Ksp)?In a gaseous RbF molecule, the bond length is 2.274 ×10=10 m. Using data from Appendix F and making thesame oversimplified assumption as in the prior problemon the shape of the potential curve from Rb++ F= to aninternuclear separation of 2.274 3 10=10 m, calculate theenergy in kJ mol-1 required to dissociate RbF to neutralatoms.a. Give the molar concentration of hydrochloric acid with a specific gravity of 1.18 andhas 37% (w/w) purity. MW=36.5 b. How would you prepare 1.2 L of 0.40 M hydrochloric acid starting from a 2.0 M solution?
- KMnO4 and Na2C2O4 solutions were used in the reactions that took place in a back titration to determine the amount of H2O2 in a sample. Calculate the concentration of H2O2 in the sample (w / v) as% by making appropriate assumptions for the volumes and normality of all these solutions.A(n) ___________ property describes the behavior of asubstance when it reacts or combines with anothersubstance.5answer the following with explanation
- Calculate qtotal for 2.0 mol of I2 (M = 253.8 g mol-1; theta r = 0.054 K; theta v =310 K; g0 = 1; De = 35.9 kcal mol-1) at 300 K and 2.0 atm pressure. Assumeideal behavior (except in the calculation of qvib).For the isomerization of CH3NC, Ea = 161.0 kJ/mol and k = 0.4100 at 600.0 K. At what temperature (Kelvin scale) is k = 27.08 s−1?Hexanoic acid was added to an immiscible biphasic solvent sysem, water and CCl4 at 20.0OC and the equilibrium concentrations of hexanoic acid were determined to be 3.66 g/L in H2O and 67.0 g/L in CCl4. Caluclate the distrubution coeffiecent (D1) of hexanoic acid in CCl4 with respect to water.