Question

What is the mole fraction of glucose in $10\%\, w/W$ glucose solution?

• A. $0.01$
• B. $0.02$
• C. $0.03$
• D. $0.04$

Answer 1

Answer: (A)

$0.01$

Answer 2

No. of moles of glucose $= \frac{10}{180} = 0.0555 \,mol$ No. of moles of water $= \frac{90}{18} = 5\,mol$ Number of moles of solution $= 5.0555\, mol$ Mole fraction of glucose $=\frac{\text{No. of moles of glucose}}{\text{No. of moles of solution}}$ $= \frac{0.0555}{5.0555} = 0.01$