Question

If a solution contains same number of moles of A and B then what will be the mole fraction of A

Answer 1

Given-the number of moles of solute A, $n_1=n$

The number of moles of solute B, $n_2=n$

Find-The mole fraction of A, $X_a$

Solution-Find $X_a$, the formula used

Mole fraction = number of moles of solute/ Total number of moles of all the solute

$X=n_1/n_1+n_2$

Applying the above formula

$X_a=n_1/n_1+n_2$

As the number of moles of solute A, and $B=n$

$\therefore X_a=n/n+n\\=n/2n\\=1/2\\=0.5\\X_a=0.5$

Hence, the mole fraction of A is $0.5$ #SPJ2