What is the mole fraction of the solute in a 1.00 m aqueous solution ?

Question

What is the mole fraction of the solute in a 1.00 m aqueous solution ? (A) 0.0354 (B) 0.0177 (C) 0.177 (D) 1.770

Tardigrade Admin · Accepted Answer

1.00 m solution means 1 mole solute is present in 1000 g water. nH2 = (1000/18) = 55.5 mol H2O Xsolute = (nsolute/nsolute + nH2O) = (1/1+55.5) = 0.0177

Q. What is the mole fraction of the solute in a $1.00 m$ aqueous solution ?

0.0354

0.0177

0.177

1.770

$1.00 m$ solution means $1$ mole solute is present in $1000 g$ water.
$n_{H_{2}} = \frac{1000}{18} = 55.5 m o l H_{2} O$
$X_{so l u t e} = \frac{n _{so l u t e}}{n _{so l u t e} + n _{H_{2} O}} = \frac{1}{1 + 55.5} = 0.0177$

Q. What is the mole fraction of the solute in a 1.00m aqueous solution ?