Average activity coefficient for HBr is 0.930 for three different diluted solutions at 250C. (at m = 5.0 mmol kg-1), 0.907 (at m = 10.0 mmol kg-1 ), and 0.879 (m 20.0 It is given in mmol / kg -1). Calculate the approximate value of the constant B in the expanded Debye Hückel law. %3D
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- How do I estimate the mean ionic activity coefficient of a 0.00250 mol/kg of AlBr3 @25°C by using the limiting law of Debye-Hückel. How would I determine how ideal the solution is?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?To verify Beer’s Law for solution of KMnO4 or K2Cr2O7 using colorimeter.
- Tube 1 and Tube 2: at 20C and 4 mL(0,1M NaOH) and 10 mL Benzoic acid,solution concentration . Calculate solubility at 20C as molality. (take density of the solution as 1 g/mL). And then find ln(molality)Calculate the mass of naphthalene required to give a freezing point depression of 2.9°C when dissolved in the amount of cyclohexane specified in the procedure(15mL). For this prelab problem you should use the density of cyclohexane as being 0.7781 g/mL at room temperature.It is found that the boiling point of a binary solution of A and B with xA = 0.4217 is 96 °C. At this temperature the vapor pressures of pure A and B are 110.1 kPa and 50.60 kPa, respectively. a) Is this solution ideal? b) What is the initial composition of the vapor above the solution?
- Assume you dissolve 30.0 g of cobalt sulfate heptahydrate (CoSO4.7H2O) in 500 ml of a 1.0 MH2SO4 solution. Calculate the following for CoSO4.7H2O in this solution:(The Specific Gravity of 1.0 M H2SO4 @ 20°C is 1.0814 g/ml.) Molality, Mole fraction and Weight percentageBenzene and Toluene form nearly ideal solutions. The boiling point of purer benzene is 80.1°C. Calculate the chemical potential of benzene relative to that of pure benzene when Xbenzene=0.30 (mole fraction) at its boiling point. If the activity coefficient of benzene in this solution were actually 0.93 rather than 1.00, what would be its vapor pressure?Consider a binary solution for which the vapor pressure (in torr) of one of the components (say component 1) is given empirically by Calculate the activity and the activity coefficient of component 1 when x1 = 0.25 based on (a) a solvent standard state; (b) a solute standard state.
- Calculate the solubility of 1,4-dibromobenzene in benzene at 25.000C and at 45.000 assuming that these two compounds form ideal mixtures. The enthalpy of fusion of 1,4-dibromo benzene is 20.39 kJ mol-1 and its melting point is 87.400C. Report the solubility of 1,4-dibromo benzene in benzene as (a) its mole fraction, and (b) grams of 1,4-dibromo benzene in 1000 grams of benzene.A solution is prepared by dissolving 40.00 g of MgCl2 (f.w. = 95.211 g mol–1), a non-volatile solute, in enough water (m.w. = 18.02 g mol–1) to result in exactly 2 L of solution at 25 °C. Assume the density of the solution is that of pure water (dsolution = 1.000 g mL–1). The ebullioscopic constant (Kb) for water is 0.513 °C m–1. The cryoscopic constant (Kf) for water is 1.86 °C m–1. The vapor pressure of pure water is 0.0313 atm. Determine the freezing point of the solution.A solution is prepared by dissolving 40.00 g of MgCl2 (f.w. = 95.211 g mol–1), a non-volatile solute, in enough water (m.w. = 18.02 g mol–1) to result in exactly 2 L of solution at 25 °C. Assume the density of the solution is that of pure water (dsolution = 1.000 g mL–1). The ebullioscopic constant (Kb) for water is 0.513 °C m–1. The cryoscopic constant (Kf) for water is 1.86 °C m–1. The vapor pressure of pure water is 0.0313 atm. Determine the osmotic pressure in atm.