What are the mole fractions of the components of the solution formed when 92 g glycerol is mixed with 90 g water? (molecular weight water = 18; molecular weight of glycerol = 92)
Question
What are the mole fractions of the components of the solution formed when 92 g glycerol is mixed with 90 g water? (molecular weight water = 18; molecular weight of glycerol = 92)
Solution
Step 1: Calculate the moles of each component
The number of moles of a substance can be calculated using the formula:
Number of moles = mass of substance / molar mass of substance
For water: Number of moles = 90 g / 18 g/mol = 5 moles
For glycerol: Number of moles = 92 g / 92 g/mol = 1 mole
Step 2: Calculate the total moles in the solution
Total moles = moles of water + moles of glycerol = 5 moles + 1 mole = 6 moles
Step 3: Calculate the mole fraction of each component
The mole fraction of a component in a solution is the ratio of the number of moles of that component to the total number of moles of all components in the solution.
Mole fraction of water = moles of water / total moles = 5 moles / 6 moles = 0.833
Mole fraction of glycerol = moles of glycerol / total moles = 1 mole / 6 moles = 0.167
So, the mole fraction of water in the solution is 0.833 and the mole fraction of glycerol is 0.167.
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