Question

A gaseous solution of a and b contains 2 moles of a and 2 moles of b . Mole fraction of A+ mole fraction of B will be ?

Answer 1

Answer:

always one because mole fraction of two or more than two component on add result gives one

Answer 2

Concept:

The number of moles of a particular component in the solution divided by the overall number of moles in the sample solution is known as the mole fraction.

Given:

The number of moles of a = 2mol

The number of moles of b = 2 mol

Find:

Calculate the mole fraction of A + mole fraction of B.

Solution:

The mole fraction can be calculated as:

 Mole fraction of solute = number of moles of solute / (Total number of moles of solute and solvent)

The total number of moles of the gaseous solution = 2 mol + 2 mol = 4 mol

By substituting the given values in the above expression we can calculate the mole fraction of A and the mole fraction of B as follows below:

Mole fraction of A = number of moles of A / (Total number of moles of A and B)

= 2 mol / 4 mol

= 0.5

Mole fraction of B = number of moles of B / (Total number of moles of A and B)

= 2 mol / 4 mol

= 0.5

Now, the mole fraction of A + mole fraction of B =  The mole fraction of A + The mole fraction of B.

= 0.5 + 0.5

= 1

Hence, the mole fraction of A + mole fraction of B is 1.

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