Understanding Solution Concentration

What is the definition of molarity?

• Molarity is the volume of solute per mole of solution.

• Molarity is the mass of solute per liter of solution.

• Molarity is the number of moles of solute per liter of solution.

• Molarity is the concentration of solute in grams per liter of solution.

How do you calculate molality from moles of solute and mass of solvent?

• molality (m) = moles of solute / mass of solvent (kg)

• molality (m) = moles of solute * mass of solvent (kg)

• molality (m) = moles of solute + mass of solvent (kg)

• molality (m) = mass of solvent / moles of solute

If a solution contains 2 moles of solute in 8 moles of solvent, what is the mole fraction of the solute?

• 0.2

• 0.25

• 0.1

• 0.5

In what scenarios is mole fraction preferred over molarity or molality?

• Mole fraction is preferred in gas mixtures, thermodynamic calculations, and very dilute solutions.

• Mole fraction is only used in concentrated solutions.

• Molarity is preferred in gas mixtures.

• Molality is used for thermodynamic calculations.

Compare and contrast molarity, molality, and mole fraction in terms of their definitions and applications.

• Molarity and molality are both volume-based, while mole fraction is based on weight.

• Molarity is volume-based, molality is mass-based, and mole fraction is a ratio of moles.

• Molarity is based on mass, molality is based on volume, and mole fraction is a percentage.

• Molarity is a ratio of moles, molality is a volume-based measure, and mole fraction is mass-based.