What are the mole fractions of H3 PO4 and water in a...

What are the mole fractions of $\mathrm{H}_{3} \mathrm{PO}_{4}$ and water in a solution of $14.5 \mathrm{g}$ of $\mathrm{H}_{3} \mathrm{PO}_{4}$ in $125 \mathrm{g}$ of water?
(a) Outline the steps necessary to answer the question.
(b) Answer the question.

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Key Concepts

Mole Conversion

This concept involves converting a given mass of a substance to the number of moles by using the substance's molar mass. The number of moles is calculated by dividing the mass (in grams) by the molar mass (in grams per mole), allowing you to quantify the amount of a substance in chemical reactions or solutions.

Molar Mass

The molar mass is the mass of one mole of a substance, typically expressed in grams per mole. It provides the necessary link between the mass of a sample and the amount of substance, facilitating calculations that convert mass measurements into moles.

Mole Fraction

Mole fraction is a way to express the concentration of a component in a mixture. It is defined as the ratio of the number of moles of a particular component to the total number of moles of all components in the mixture. This unitless fraction is useful in characterizing the composition of solutions and mixtures.

Solution Composition

In the context of mixtures, particularly solutions, understanding the composition involves determining the amounts of both the solute and the solvent. This process requires calculating the number of moles of each component, which can then be used to determine ratios such as the mole fraction to describe the solution's overall makeup.

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