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The mean activity coefficient for an aqueous
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Chapter 8 Solutions
Physical Chemistry
- The dispersed phase of a certain colloidal dispersion consists of spheres of diameter 1.0 102 nm. (a) What are the volume (V=43r2) and surface area (A = r2) of each sphere? (b) How many spheres are required to give a total volume of 1.0 cm3? What is the total surface area of these spheres in square meters?arrow_forwardPhenol (C6H5OH) is partially dimerized in the solvent bromoform. When 2.58 g of phenol is dissolved in 100 g of bromoform, the bromoform freezing point is lowered by 2.37°C. Pure bromoform freezes at 8.3°C and has kf = 14.1°C kg/mol. Calculate the equilibrium constant Km for the dimerization reaction of phenol in bromoform at 6°C, assuming an ideally dilute solution.arrow_forwardA solution contains 5% w/v Al2(SO4)3.14H20 (MW = 600). Assuming there is complete ionization, calculate the osmolarity of the solution.arrow_forward
- Determine the molality of a 5.001 wt % aqueous solution of LICl.arrow_forwardCalculate the osmotic pressure at 25°C of an aqueous solution of 1.00 g/L of a protein having molar mass=2.90×10^4 g/mol.arrow_forward1. Determine the molar mass of the hormone. 2. Estimate the osmotic pressure in kPa of a 0.145M solution of Al(NO3)3 at 25 degrees Celsius.arrow_forward
- Calculate the osmotic pressure at 25°C across a semipermeable membrane separating seawater (1.14 M total particles) from a 0.436 M solution of aqueous NaCl.arrow_forwardCalculate the osmotic pressure of a 1 M aqueous solution of a non-dissociated solute at 20 °C.arrow_forwardWhat is the freezing point of a 0.400 m solution of sucrose in ethanol? The freezing point depression constant forethanol is 1.99oC/m and the freezing point of ethanol is -114.1oC.arrow_forward
- This question is related to chemical potential in a solution and how it relates to physical properties. What is the relationship between the freezing point of a dilute solution vs. that of the pure liquid? Provide an explanation for this relationship based on thermodynamics. If the temperature is increased in a saturated solution of A in equilibrium with solid A, what will you observe? Give a thermodynamic explanation for this (based on chemical potential and mole fraction)arrow_forwardCalculate the freezing point of a .2m CaCl2 aqueous solution, assuming it dissociates completely to rom ions in solutionarrow_forwardCalculate the equilibrium concentration of carbon dioxide in fat given that the Henry's law constant is 8.6 x 104 Torr and the partial pressure of carbon dioxide is 55 kPa.arrow_forward
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