Determine the relation between the osmotic pressure and the concentration of solute. Compare your results with the Morse’s equation given below. This law is valid for an ideal solution with a low concentration of solute...
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solute. Compare your results with the Morse’s equation given below. This law is
valid for an ideal solution with a low concentration of solute...
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- Haemoglobin, the red blood protein responsible for oxygen transport, binds about 1.34 cm3 of oxygen per gram. Normal blood has a haemoglobin concentration of 150 g dm-3 . Haemoglobin in the lungs is about 97 per cent saturated with oxygen, but in the capillary is only about 75 per cent saturated. (a) What volume of oxygen is given up by 100 cm3 of blood flowing from the lungs in the capillary? Breathing air at high pressures, such as in scuba diving, results in an increased concentration of dissolved nitrogen. The Henry's law constant in the form c = Kp for the solubility of nitrogen is 0.18 μg/(g H2O atm). (b) What mass of nitrogen is dissolved in 100 g of water saturated with air at 4.0 atm and 20 °C? Compare your answer to that for 100 g of water saturated with air at 1.0 atm. (Air is 78.08 mole per cent N2.) (c) If nitrogen is four times as soluble in fatty tissues as in water, what is the increase in nitrogen concentration in fatty tissue in going from 1 atm to 4 atm.The density of grain alcohol is 0.789 g/mL. Given that thedensity of water at 48C is 1.00 g/mL, what is the specificgravity of grain alcohol?At an air-water interface, fatty acids such as oleic acid liein a one-molecule-thick layer (monolayer), with the heads in thewater and the tails perpendicular in the air. When 2.50 mg of oleic acid is placed on a water surface, it forms a circular mono-layer 38.6 cm in diameter. Find the surface area (in cm²) occu-pied by one molecule (of oleic acid M=283 g/mol).
- The concentration at which micelles first form in solution is known as critical micelle concentration (CMC), explain briefly how the critical micelle concentration can be determined/measured? You may use figures to help illustrate your answer.The osmotic pressure of a benzene solution containing 5.00 g of polystyrene perliter was found to be 7.60 torr at 25°C. Estimate the average molecular weightof the polystyrene in this sample.Osmotic pressures are often reported in units of atmospheres or mm Hg. The latter impliesthat the height of a column of liquid can be used as a measure of pressure. This is, in fact, thebasis of the torricellian barometer from which the units of “torr” come. The pressure, P, isrelated to the height of the column by:P = ρghwhere ρ is the density of the liquid, g is the acceleration due to gravity and h is the height. Whatwill be the height (in mm) of a column of aqueous solution with a density of 0.9987 g/mL, if theosmotic pressure of the solution at 25 °C is 1.4 mm Hg? The density of mercury at thistemperature is 13.8 g/mL
- True or FalseShow solutoinIf the limiting ionic conductivity of Mg2+ is 54.08 S∙cm2/mol, the mobility of Mg2+ is 2.803 x 10-4 m2 /V.s.Define cohesion and adhesion, and how they can predict capillary action.Consider the following scenario: a small amount of a solid got into a sample when preparing the capillary tube to determine its melting point. The student decided to take the melting point anyway. The student observes the following: (a) a sharp melting point (<2oC); (b) a melting point that closely matches the literature reported value. Which of the following conclusions will not be justified by the experimental results. The solid was a soluble impurity in the liquid phase. The solid was an insoluble impurity in the liquid phase. The solid was a sample of the same compound.
- The molar mass of an enzyme was determined by dissolving it in water, and measuring the height, h, of the resulting solution drawn up a capillary tube at 20 °C. The following data were obtained.C/(mg cm-3) 3.221 4.618 5.112 6.722h/cm 5.746 8.238 9.119 11.990The osmotic pressure may be calculated from the height of the column, ∏= hpg, taking the mass density of the solution as p = 1.000 g cm-3 and the acceleration of free fall as g = 9.81 m s-2. Determine the molar mass of the enzyme.The amount of urea in ppm [parts per million] present in an aqueous solution containing 45 % by mass of solvent is ______ 8.18 X 10 to the power of 5 space end exponent p p m 1.22 X 10 to the power of 6 space end exponent p p m 4.50 X 10 to the power of 5 space end exponent p p m 5.50 X 10 to the power of 5 space end exponent p p mHow many moles of analyte are present in 10 micromolar solution that occupies 1% of the length of 60 micrometer × 25 micrometer capillary?