Question

what is the mole fraction of glucose in 10%w/W glucose solution?

Answer 1

Hey here is your ansr....

it just a simple calculation.

10% glucose solution is 10g/100ml or 100g/litre

1 mole of glucose is C6H12O6 72+12+96 = 180

100/180 moles / liters = 0.556M glucose

Answer 2

The mole fraction of glucose in 10%w/w glucose solution is $9.9\times 10^{-3}$

Explanation:

Mole fraction of a substance is the ratio of the moles of that substance to the total number of moles present.

It is given: 10 g of glucose is present in 100 g of solution i.e (100-10) = 90 g of water is present

${\text {mole fraction of glucose}}=\frac{\text{moles of glucose}}{\text {moles of glucose + moles of water}}$

The formula for the calculation of moles is shown below:

$moles=\frac{Mass}{Molar\mass}$

Mass of glucose = 10 g

Molar mass of glucose = 180 g/mo

$\text{Moles of glucose}= \frac{10g}{180g/mol}=0.05$

Mass of water = 90 g

Molar mass of water = 18 g/mol

$\text{Moles of water}= \frac{90g}{18g/mol}=5$

${\text {mole fraction of glucose}}=\frac{0.05}{0.05+5}=9.9\times 10^{-3}$

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