7.When boron trifluoride reacts with NH3 the bond formed is ? 8.What is the partial vapour pressure of methanol in a mixture of methanol and ethanl if the mole fraction of ethanol is 0.8 and total pressure of the mixture is 1 atm 9.The PH of 0.01M HZS04 is ? 10.Impure or crude sugar can be purified by A.recrystalisation B. Filtration C.Solvent Extraction D.Sublimation

7.When boron trifluoride reacts with NH3 the bond formed is ? 8.What is the partial vapour pressure of methanol in a mixture of methanol and ethanl if the mole fraction of ethanol is 0.8 and total pressure of the mixture is 1 atm 9.The PH of 0.01M HZS04 is ? 10.Impure or crude sugar can be purified by A.recrystalisation B. Filtration C.Solvent Extraction D.Sublimation

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Consider the following solutions at 20 °C:I: 0.5 moles trifluoroacetic acid in 1.0 mole of waterII: 0.5 moles trifluoroacetic acid in 1.0 mole of acetonitrileWhich solution would have the greater vapour pressure? Justify your answerfully with calculations
Comelli and Francesconi examined mixtures of propionic acid with various other organic liquids at 313.15 K (F. Comelli and R. Francesconi, J. Chem. Eng. Data 41, 101 (1996)). They report the excess volume of mixing propionic acid with tetrahydropyran (THP, oxane) as VE = x1x2{a0 + a1(x1 − x2)}, where x1 is the mole fraction of propionic acid, x2 that of THP, a0 = −2.4697 cm3 mol−1, and a1 = 0.0608 cm3 mol−1. The density of propionic acid at this temperature is 0.971 74 g cm−3; that of THP is 0.863 98 g cm−3. (a) Derive an expression for the partial molar volume of each component at this temperature. (b) Compute the partial molar volume for each component in an equimolar mixture.
At 90 °C the vapour pressure of toluene (methylbenzene) is 53 kPa and that of o-xylene (1,2-dimethylbenzene) is 20 kPa. (a) What is the molar fraction of toluene in the liquid mixture when the total vapor pressure is 0.50 atm at 90 °C? In liquid, xtoluene =........... At 90 °C the vapour pressure of toluene (methylbenzene) is 53 kPa and that of o-xylene (1,2-dimethylbenzene) is 20 kPa. (b) What is the molar fraction of toluene in the gas phase when the total vapor pressure is 0.50 atm at 90 °C? In gas, xtoluene = __________ .
Consider the following solutions at 20°C: I) 0.5 Moles of trifluoroacetic acid in 1 mole of water II) 0.5 Moles of trifluoroacetic acid in 1 mole of acetonitrile Which solution would have the greater vapour pressure , justify your answer fully?
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.
1 At a temperature of 302.8 K, mixtures of phenol andwater exist as two separate phases with mole fractionsof phenol of 0.30 and 0.93. Use the lever rule to determine the relative amounts of the two phases for amixture w ith an overall mole fraction of phenol of 0.45.
The boiling point at 1.236 atm pressure of a solution of 0.6589 mole fraction of benzene and 0.3411 mole fraction toluene is 88°C. At this temperature the the vapour pressures of pure benzene and toluene are 1.276 and 0.5059 atm, respectively. What is the vapour composition that boils off this liquid?
A dilute solution of bromine in carbon tetrachloride behaves as an ideal dilute solution. The vapour pressure of pure CCl4 is 33.85 Torr at 298 K. The Henry’s law constant when the concentration of Br2 is expressed as a mole fraction is 122.36 Torr. Calculate the vapour pressure of each component, the total pressure, and the composition of the vapour phase when the mole fraction of Br2 is 0.050, on the assumption that the conditions of the ideal dilute solution are satisfied at this concentration.
A solution is prepared by dissolving 40.00 g of NaCl (f.w. = 58.44 g mol–1), a non-volatile solute, in enough water (m.w. = 18.02 g mol–1) to result in exactly 1 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. Find the freezing point of the solution(in C to 2 decimal places)
A solution is prepared by dissolving 40.00 g of NaCl (f.w. = 58.44 g mol–1), a non-volatile solute, in enough water (m.w. = 18.02 g mol–1) to result in exactly 1 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. Find the vapor pressure of the solution to 3 decimal places in atm.
A solution is prepared by dissolving 40.00 g of NaCl (f.w. = 58.44 g mol–1), a non-volatile solute, in enough water (m.w. = 18.02 g mol–1) to result in exactly 1 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. Find the osmotic pressure in atm to three decimal places
A solution is prepared by dissolving 40.00 g of NaCl (f.w. = 58.44 g mol–1), a non-volatile solute, in enough water (m.w. = 18.02 g mol–1) to result in exactly 1 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 boiling point of the solution(in C to 2 decimal places)