4B. (8 pts) What mass of ethylene glycol (C2H4O2), when mixed with 125 g H20, will reduce the equilibrium vapor pressure

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4b 8 Pts What Mass Of Ethylene Glycol C2h4o2 When Mixed With 125 G H20 Will Reduce The Equilibrium Vapor Pressure 1 (31.61 KiB) Viewed 12 times

4B. (8 pts) What mass of ethylene glycol (C2H4O2), when mixed with 125 g H20, will reduce the equilibrium vapor pressure of H2O from 1.00 atm to 0.780 atm at 100 °C? The molar masses of water and ethylene glycol are 18.02 g/mol and 62.07 g/mol, respectively. Assume ideal behavior for the solution. SB. (9 pts) If a 45.0-g sample of a salt in ionic molecular form of XY2 is dissolved in 250.0 g of water, the resulting solution will freeze at -8.37°C. What is the molar mass of the salt? (Ke for water is -1.86 °C/m.) (6B) K9 pts) The osmotic pressure of blood is 7.65 atm at 37 °C. What mass of glucose (C.H2O6, molar mass= 180.2 g/mol) is needed to prepare 1.25 L of solution for intravenous injection? The osmotic pressure of the glucose solution must equal to the osmotic pressure of blood. (R = 0.0821 L'atm/ mol K)