Week 6 Flashcard

Front

What physical property is used to separate the hydrocarbon components in petroleum (crude oil)?

Back

Boiling point is the physical property used to separate hydrocarbon components in petroleum.

Front

What is the van ’t Hoff factor?

Back

The van ’t Hoff factor (i) is a measure of the number of particles a solute produces in solution, affecting colligative properties.

Front

What is a colligative property?

Back

Colligative properties are properties of solutions that depend on the number of solute particles in a given amount of solvent, not the identity of the solute.

Front

What is the freezing point depression formula?

Back

The freezing point depression formula is ΔTf = i * Kf * m, where ΔTf is the change in freezing point, i is the van ’t Hoff factor, Kf is the freezing point depression constant, and m is the molality.

Front

What is molality?

Back

Molality (m) is defined as the number of moles of solute per kilogram of solvent.

Front

What is the significance of the van ’t Hoff factor being greater than 1?

Back

A van ’t Hoff factor greater than 1 indicates that the solute dissociates into multiple particles in solution, affecting colligative properties.

Front

What is the relationship between concentration and ion pairing in solutions?

Back

As concentration increases, the probability of ion pairing increases, leading to nonideal behavior in solutions.

Front

What is the effect of charge on dissolved ions on deviation from ideal behavior?

Back

The deviation from ideal behavior generally increases as the charge on dissolved ions increases.

Front

How do you calculate the molal concentration of a solution?

Back

To calculate molal concentration, use the formula m = moles of solute / kilograms of solvent.

Front

What is the molar mass of table sugar (C12H22O11)?

Back

The molar mass of table sugar (C12H22O11) is 342.3 g/mol.