Answered

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Determine the mole fraction of NaCl in a solution that has 0.589 mol NaCl and 0.625 mol water.

Sagot :

Step 1

A mole fraction is defined as:

Mole fraction (compound X) = moles of compound X/total moles

It has no units

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Step 2

The solution is formed by solute and solvent. Therefore, the total moles will be:

0.589 moles NaCl + 0.625 moles water = 1.214 moles

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Step 3

Molar fraction (NaCl) = moles NaCl/total moles = 0.589 moles/1.214 moles = 0.49 approx.

Answer: Molar fraction of NaCl = 0.49

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