Advertisements
Advertisements
प्रश्न
The vapour pressure of a pure solvent at a certain temperature is 0.0227 bar. What is the vapour pressure of a solution containing 6 g of solute (M = 60 g/mol) in 50 g of solvent?
Advertisements
उत्तर
Given: Vapour pressure of pure solvent = `"P"_1^0` = 0.0227 bar
Mass of solute = 6 g
Molar mass of solute = 60 g mol–1
Mass of solvent = 50 g
To find: Vapour pressure of the solution
Formula: `("P"_1^0 - "P"_1)/"P"_1^0 = ("W"_2"M"_1)/("M"_2"W"_1)`
Calculation: Molar mass of solvent = 18 g mol–1 (Assuming water as the solvent)
Using formula,
`("P"_1^0 - "P"_1)/"P"_1^0 = ("W"_2"M"_1)/("M"_2"W"_1)`
`(0.0227 "bar" - "P"_1)/(0.0227 "bar") = (6 "g" xx 18 "g mol"^-1)/(50 "g" xx 60 "g mol"^-1)`
∴ `(0.0227 "bar" - "P"_1)/(0.0227 "bar")` = 0.036
∴ 0.0227 bar − P1 = 0.036 × 0.0227 bar
∴ P1 = 0.0227 bar − 8.172 × 10−4 bar = 0.022 bar
Vapour pressure of the given solution is 0.022 bar.
APPEARS IN
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 _______.
State Raoult’s law for the solutions of non-volatile solutes in volatile solvents.
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.
State Raoult’s law.
What type of solutions exhibit positive deviations from Raoult’s law?
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.
Which of the following statements is INCORRECT?
Which of the following metals is refined by vapour phase refining in Mond process?
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 ______.
If 1 mole of ____________ is added to 1 dm3 of water, the boiling point of water will decrease.
5.0 g of sodium hydroxide (molar mass 40 g mol-1) is dissolved in little quantity of water and the solution is diluted upto 100 mL. What is the molarity of the resulting solution?
A solution of acetone in ethanol ______.
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?
Total vapour pressure of a mixture of 1 mole A`("p"_"A"^circ = 150 " torr")` and 2 mole B`("p"_"B"^circ = 240 " torr")` is 200 mm. In this case, ______.
What are ideal and non-ideal solutions?
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?
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.
The solutions that obey Raoult's law over entire range of concentrations are ______.
