If you make a solution by adding 5.0 moles of sodium hydroxide to 25.0 moles of water, what is the mole fraction of sodium hydroxide in this solution?

Explanation:

The mole fraction (χ) is  the number of moles of a component divided by the total number of moles in a mixture.  

Let water = Component 1 and NaOH = component 2.

1. Calculate the total moles.

n₁ = 25.0 mol

n₂ = 5.0 mol

2. Calculate the mole fraction of NaOH

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