Mole fraction of the solute in a 1.00 molal aqueous solution is

Question

Mole fraction of the solute in a 1.00 molal aqueous solution is (A) 0.1770 (B) 0.0177 (C) 0.0344 (D) 1.7700

Tardigrade Admin · Accepted Answer

1.00 molal solution means 1 mole of solute in 1 kg (or 1000 g ) of water. Number of moles of solute =1 Number of moles of solvent =(1000/18)=55.55 Mole fraction of Solute =(1/1+55.55)=0.01768

Q. Mole fraction of the solute in a $1.00$ molal aqueous solution is

0.1770

0.0177

0.0344

1.7700

$1.00$ molal solution means $1$ mole of solute in $1 k g$ (or $1000 g$ ) of water.
Number of moles of solute $= 1$
Number of moles of solvent $= \frac{1000}{18} = 55.55$
Mole fraction of Solute $= \frac{1}{1 + 55.55} = 0.01768$

Q. Mole fraction of the solute in a 1.00 molal aqueous solution is