Advertisements
Advertisements
प्रश्न
The vapour pressures of pure liquids A and B are 0.600 bar and 0.933 bar respectively, at a certain temperature.
What is the mole fraction of liquid B in the solution when the total vapour pressure of their mixture is 0.8 bar?
Advertisements
उत्तर
Given: Vapour pressure of pure liquid A `("P"_1^0)` = 0.600 bar
Vapour pressure of pure liquid B `("P"_2^0)` = 0.933 bar
Total pressure (P) = 0.8 bar
To find: Mole fraction of liquid B in the solution
Formula: P = `("P"_2^0 - "P"_1^0)x_2 + "P"_1^0`
0.8 bar = (0.933 bar − 0.600 bar) x2 + 0.600 bar
∴ 0.8 − 0.600 = 0.333 x2
∴ `x_2 = 0.2/0.333 = 0.6`
Mole fraction of liquid B in the solution is 0.6.
संबंधित प्रश्न
Choose the most correct option.
The vapour pressure of a solution containing 2 moles of a solute in 2 moles of water (vapour pressure of pure water = 24 mm Hg) is ______.
Choose the most correct option.
Vapour pressure of a solution is _______.
Answer the following.
Using Raoult’s law, how will you show that ΔP = `"P"_1^0 "x"_2`? Where, x2 is the mole fraction of solute in the solution and `"P"_1^0` vapour pressure of pure solvent.
Fish generally needs O2 concentration in water at least 3.8 mg/L for survival. What partial pressure of O2 above the water is needed for the survival of fish? Given the solubility of O2 in water at 0 °C and 1 atm-1 partial pressure is 2.2 × 10-3 atm mol/L.
A mixture of benzene and toluene contains 30% by mass of toluene. At 30°C, vapour pressure of pure toluene is 36.7 mm Hg and that of pure benzene is 118.2 mm Hg. Assuming that the two liquids form ideal solutions, calculate the total pressure and partial pressure of each constituent above the solution at 30°C.
What is enthalpy change and volume change of mixing of two components forming an ideal solution?
Distinguish between ideal and non-ideal solutions.
With the help of vapour pressure-temperature curves for solution and solvent, explain why boiling point of solvent is elevated when a nonvolatile solute is dissolved into it.
What are non-ideal solutions?
Explain with reasons and diagrams, the positive and negative deviations from Raoult’s law shown by nonideal solutions.
Which of the following statements is INCORRECT?
Which of the following is NOT nonideal solution?
9 gram anhydrous oxalic acid (mol. wt. = 90) was dissolved in 9.9 moles of water. If vapour pressure of pure water is pf the vapour pressure of solution is ______.
For an ideal binary liquid solution with `"p"_"A"^circ > "P"_"B"^circ`, which is a relation between XA (mole fraction of A in liquid phase) and YA (mole fraction of A in vapour phase) is correct, XB and YB are mole fractions of B in liquid and vapour phase respectively?
The vapour pressures of two liquids A and B are 80 mmHg and 60 mm Hg respectively at 25°C. What is the vapour pressure of the solution obtained by mixing 3 moles of A and 2 moles of B?
A solution having highest vapour pressure is ______.
Explain the variation of vapour pressures with mole fractions of binary solutions of two volatile liquids forming ideal solutions.
State Raoult’s law for solutions containing volatile solutes.
Write the relationship between mole fraction of solvent and vapour pressure of solution.
