Understanding Mole Fractions ppb-ppm

What are the other ways of expressing concentrations?

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What is a mole fraction?

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If you add up the mole fractions of all components of a solution, what should the sum be? Explain your answer.

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What is the mole fraction of glucose in a solution that contains 0.50 moles of glucose and 2.50 moles of water?

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What is the mole fraction of NaCl in a solution that contains 1.25 moles of NaCl and 3.75 moles of water?

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What is the mole fraction of ethanol in a solution that contains 25 g ethanol and 75 g water?

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What is the mole fraction of KNO3 in a solution that contains 10 g KNO3 and 50 g water?

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What is the mole fraction of CaCl2 in a solution that is prepared by dissolving 15 g of CaCl2 in 50.0 mL of water? The density of water is 1.00 g/mL.

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What is the mole fraction of naphthalene in a solution that is prepared by dissolving 4.75 g of naphthalene in 250.0 mL of benzene? The density of benzene is 0.877 g/mL. The molar mass of naphthalene is 128.17 g/mol, while that of benzene is 78.11 g/mol.

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What is a part per million (ppm)?

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