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Solutions

Question

Define ‘mole fraction’ of a substance in a solution.

Solution

Mole fraction: Commonly used symbol for mole fraction is x and subscript used on the right hand side of x denotes the component.
It is defined as:
Mole fraction of a component =

$\frac{Number of moles of the component}{Total number of moles of all the components}$

For example, in a binary mixture, if the number of moles of A and B are nA and nB respectively, the mole fraction of A will be

x = $\frac{n_{A}}{n_{A} + n_{B}}$

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Solutions

Define ‘mole fraction’ of a substance in a solution.

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