Question

Calculate the mole fraction of a solute (X) in a 0.50 molal solution. (Solvent is CCl4)​

Answer 1

Explanation:

example.0.2 molal

hope it's helpful

Given that

x

B

=0.2,x A=0.8

Now,Molality (m)= x A ×M Ax B ×1000 =

0.8×180.2×1000

=13.88mwhere,M A

= molar mass of solvent

Answer 2

Concept:

Stoichiometry in Solutions and Gases is one of the major basic concept or the foundation of the Physical Chemistry that is taught in schools. Without this there is no any chemistry that can exist. Physical chemistry constitutes one of the major chunk of Chemistry for the school and graduation level. This helps in the understanding of the work of different chemicals in a mathematical approach.

Given:

Molality of the solution is

$0.50M$

Solvent Given in CCl4(Carbon Tetrachloride)

Find:

Calculate theole Fraction of the solute in the given solution.

Solution:

Applying the principles of Stoichiometry in Solutions,

$0.5M$

solution means

$0.5M$

moles of solute in

$1000g$

of Carbon Tetrachloride. Now, finding the molar mass of Carbon Tetrachloride,

$12 + 4 \times (35.5) \\ 12 + 142 \\ 154g$

therefore, No. of moles of Solvent is

$\frac{1000}{154} = 6.49 \: moles$

Therefore, the mole fraction of the solute is

$\frac{0.5}{0.5 + 6.49} = \frac{0.5}{6.99} = 0.071$

Hence, the Mole fraction of the solute is

$0.071$

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