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- The mean activity coefficient of a 0.010 m H2SO4 solution is 0.544. What is its mean activity?The mean activity coefficient of a 0.040 m H2SO4 solution is 0.354. What is its mean ionic activity? 4.0 .0089Calculate the masses of oxygen and nitrogen that are dissolved in 3.0 L of aqueous solution in equilibrium with air at 25 °C and 760 Torr. Assume that air is 21% oxygen and 78% nitrogen by volume. 0.55104 mass: Henry's law constants for gases in water at 25 °C Gas kn (bar-M-¹) He 2.7 x 10¹ N₂ 1.6 x 10' 0₂ 7.9 x 10² CO₂ 29 H₂S 10. 1.79 source: S, Rock, And Gallogly 46-General Chemistry | Publisher: University Books
- 6. When the ideal-gas reaction A+B=C+Dhas reached equilibrium, state whether or not each of the following relations must be true. Here n¡ is the number of moles of species i in equilibrium, P, is the partial pressure of i, and µ; is the chemical potential of i. Here a simple True or False answer is sufficient. (a) nc+np=nA +ng (b) Pc+Pp=PA+PB (c) na=ng (d) nc=na (e) If only A and B are present initially, then nc=np (f) Ha + HB= Hc+ Hp no matter what the initial composition. (g) If only A and B are present initially, then in equilibrium we must have nc # 0. (h) The equilibrium constant Kp(T)= PĄPB/(PcPp). (i) The value of –RT In Kp(T) = µE(T)+µ8(T)– H3(T) –- H§(T). ) The equilibrium constant is independent of the total pressure.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/mLThe partial molar volumes of water and ethanol in a solution with xH2O=0.45 at 25 ∘C are 17.0 and 57.0 cm3⋅mol−1, respectively. Calculate the volume change upon mixing sufficient ethanol with 4.30 mol of water to give this concentration. The densities of water and ethanol are 0.997 and 0.7893 g⋅cm−3, respectively, at this temperature. Express your answer to two significant figures and include the appropriate units.
- The sealed containers of fizzy drinks contain dissolved CO2. This dissolved CO2 is in equilibrium with a small quantity of gaseous CO2 at the top of the container. (a) The partial pressure of CO2 gas in a 250 cm3 can of fizzy drink is 3.0 atm at 25 0C. What is the concentration of CO2 in the fizzy drink? (b) If the can contain only the mass of CO2 1.09g as a gas, calculate the pressure in the can when it is stored at 25 0C. (c) The maximum pressure that a can of fizzy drink can withstand is 7 atm. Using the graph below, determine the maximum temperature at which a can, can be stored safely. (concentration=0.093MThe sealed containers of fizzy drinks contain dissolved CO2. This dissolved CO2 is in equilibrium with a small quantity of gaseous CO2 at the top of the container. (a) The partial pressure of CO2 gas in a 250 cm3 can of fizzy drink is 3.0 atm at 25 0C. What is the concentration of CO2 in the fizzy drink? (b) If the can contain only the mass of CO2 calculated in part (ii) as a gas, calculate the pressure in the can when it is stored at 25 0C. (c) The maximum pressure that a can of fizzy drink can withstand is 7 atm. Using the graph below, determine the maximum temperature at which a can, can be stored safely. (concentration=0.093M)The partial molar volumes of water and ethanol in a solution with H₂O = 0.45 at 25 °C are 17.0 and 57.0 cm³ mol-¹, respectively. -1 Part A AV = Calculate the volume change upon mixing sufficient ethanol with 8.20 mol of water to give this concentration. The densities of water and ethanol are 0.997 and 0.7893 g cm 5, respectively, at this temperature. Express your answer to two significant figures and include the appropriate units. Submit μÅ Value Request Answer Units Review | Constants I Periodic Table . ?
- The mean activity coefficient in an 0.050 molKg-1 LaCl3 (aq) solutions is 0.303 at 25 o C. What is the percentage error in the value predicted by the debye – Huckel limiting law?1. (a) In the experiment carried out to determine the degree of association of benzoic acid in benzene (C6H6), the cooling curves of pure benzene and benzoic acid solution prepared by dissolving 0.358 g benzoic acid in 20 mL of benzene were obtained by using Beckmann thermometer, calibrated before the experiment. The cooling curves are given in the figure below. Calculate the degree of association of benzoic acid in benzene for the given solution. Ky= 5.055 K kg.mol-¹, dbenzene- 0.876 g.cm³, MBenzoic acid=122.12 g.mol-¹ T(°C) 2.88 2.38 Benzene Solution t(min)Calculate ionic strength and mean ionic activity coefficient of a 0.03 molal aqueous solution of sodium sulphate, Na2SO4.