Question

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

• A. 0.177
• B. 0.0177
• C. 0.0344
• D. 1.77

Answer 1

Answer: (B)

0.0177

Answer 2

$1.00$ molal solution means 1 mole of solute in $1\, kg$ 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

Therefore, the correct answer is Option B)

Discover More From Chapter:Some Basic Concepts of Chemistry