Advertisements
Advertisements
प्रश्न
Calculate the mole fraction of benzene in solution containing 30% by mass in carbon tetrachloride.
Advertisements
उत्तर
Let the total mass of the solution be 100 g, and the mass of benzene be 30 g.
∴ Mass of carbon tetrachloride = (100 − 30) g
= 70 g
Molar mass of benzene (C6H6) = (6 × 12 + 6 × 1) g mol−1
= 78 g mol−1
∴ Number of moles of C6H6 = `"Mass"/"Molar mass"`
= `(30 "g")/(78 "g mol"^(−1))`
= 0.385 mol
Molar mass of carbon tetrachloride (CCl4) = 1 × 12 + 4 × 35.5
= 154 g mol−1
∴ Number of moles of CCl4 = `"Mass"/"Molar mass"`
= `(70 "g")/(154 "g mol"^(−1))`
= 0.455 mol
Thus, the mole fraction of C6H6 is given as:
`("Number of moles of C"_6"H"_6)/("Number of moles of C"_6"H"_6+"Number of moles of CCl"_4)`
= `0.385/(0.385+0.455)`
= 0.458
∴ Mole fraction of CCl4 = 1 − 0.458 = 0.542
APPEARS IN
संबंधित प्रश्न
Why is molality of a solution independent of temperature?
Calculate the molarity of the following solution:
30 g of \[\ce{Co(NO3)2 * 6H2O}\] in 4.3 L of solution.
Define Mass percentage.
How many mL of 0.1 M HCl are required to react completely with 1 g mixture of Na2CO3 and NaHCO3 containing equimolar amounts of both?
22.22 gram of urea was dissolved in 300 grams of water. Calculate the number of moles of urea and molality of the urea solution. (Given: a Molar mass of urea = 60 gram mol-1)
Molality of a solution relates the ____________.
When a solute is present in trace quantities the following expression is used:
1 M, 2.5 litre NaOH solution is mixed with another 0.5 M, 3 litre NaOH solution. Then find out the molarity of the resultant solution:
The molarity of the solution containing 7.1 g of Na2SO4 in 100 ml of aqueous solution is ____________.
10 g of NaCl is dissolved in 106 g of the solution. Its concentration is ____________.
2.5 litres of NaCl solution contain 5 moles of the solute. What is the molarity?
200 ml of water is added to 500 ml of 0.2 M solution. What is the molarity of this diluted solution?
Which of the following units is useful in relating concentration of solution with its vapour pressure?
The number of moles of NaCl in 3 litres of 3 M solution is ____________.
4 L of 0.02 M aqueous solution of NaCl was diluted by adding one litre of water. The molality of the resultant solution is ______.
What is the mole fraction of solute in 1.00 m aqueous solutions?
A solution has been prepared by dissolving 5 g of urea in 95 g of water. What is the mass percentage of urea in the solution?
The molarity of the solution prepared by dissolving 6.3 g of oxalic acid (H2C2O4 · 2 H2O) in 250 mL of water in mol L-1 is x × 10-2. The value of x is ______. (Nearest integer)
[Atomic mass: H : 1.0, C : 12.0, O : 16.0]
The mole fraction of a solute in a 100 molal aqueous solution is ______ × 10-2. (Round off to the Nearest Integer).
[Given :Atomic masses : H : 1.0 u, O : 16.0 u]
