Molality/Composition Flashcards

Flashcards on Molality, Composition, and Crystallization

What is the definition of molality and how does it differ from molarity? What unit is used to measure molality?

Molality is the number of moles of solute per kilogram of solvent. It differs from molarity, which is moles of solute per liter of solution. The unit used to measure molality is mol/kg or m.

How do you find the percent compositions of different compounds?

Percent composition is determined by finding the mass of each element in a compound, dividing by the total molar mass of the compound, and multiplying by 100%.

How does crystallization work?

Crystallization is a separation technique that results in the formation of pure solid particles from a solution containing the dissolved substance. The solution is typically cooled, causing the solute to come out of solution and form crystals.

What is the definition of molality and how does it differ from molarity? What unit is used to measure molality?

Molality is the number of moles of solute per kilogram of solvent. It differs from molarity, which is moles of solute per liter of solution. The unit used to measure molality is mol/kg or m.

How do you find the percent compositions of different compounds?

Percent composition is determined by finding the mass of each element in a compound, dividing by the total molar mass of the compound, and multiplying by 100%.

How does crystallization work?

Crystallization is a separation technique that results in the formation of pure solid particles from a solution containing the dissolved substance. The solution is typically cooled, causing the solute to come out of solution and form crystals.

What are the percent composition and molality equations?

The equation for percent composition is: \text{Percent Composition} = (\frac{\text{Mass of Element}}{\text{Total Molar Mass of Compound}}) \times 100\% . The equation of Molality is: \text{Molality (m)} = \frac{\text{Moles of Solute}}{\text{Kilograms of Solvent}}