Problem: A solution is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water.  Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

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We’re being asked to calculate the mole fraction of sucrose (C12H22O11in a solution that is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water.

Sucrose (C12H22O11→ lesser in amount → solute
Water (H2O) → greater in amount → solvent


Mole Fraction (X) relates the moles of solute and solvent within a solution:

mole fraction (X)=mole of solutemole of solution


We’ll calculate the mole fraction of sucrose using the following steps:

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A solution is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water.  Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

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