difference between mole fraction and mass fraction of solution having 9.24 c2h5oh in 18 grams H2O
Answers
Answer:
Mole fraction describes the number of molecules (or moles) of one component divided by total the number of molecules (or moles) in the mixture.
Mole fraction is useful when two reactive components are mixed together, as the ratio of the two components is known if the mole fraction of each is known.
Multiplying mole fraction by 100 gives mole percent, which describes the same thing as mole fraction, just in a different form. Mole fractions can be generated from various concentrations including molality, molarity and mass percent compositions.
Terms
mole fractionThe ratio of the number of moles of one component in a mixture to the total number of moles.
moleThe SI base unit for the amount of a substance; the amount of substance that contains as many elementary entities as there are atoms in 0.012 kg of carbon-12The mole fraction is used very frequently in the construction of phase diagrams. It has a number of advantages:
It is not temperature dependent, as opposed to molar concentration, and does not require knowledge of the densities of the phase(s) involved.
A mixture of known mole fractions can be prepared by weighing the appropriate masses of the constituents.
The measure is symmetric; in the mole fractions x=0.1 and x=0.9, the roles of ‘solvent’ and ‘solute’ are reversible.
In a mixture of ideal gases, the mole fraction can be expressed as the ratio of partial pressure to total pressure of the mixture.
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Explanation: