IIT/JEE Chemistry Practice #9: Molarity/Molality

The video tutorial explores questions related to molarity and molality, focusing on calculating molarity using Avogadro's number and understanding how temperature changes affect solution parameters. It explains why molality is preferred for colligative properties due to its stability with temperature changes.

What is the primary data given in the first question about urea?

• Temperature of the solution

• Mass of urea

• Number of molecules

• Volume of the solution

How do you convert molecules to moles in the first question?

• By using the volume of the solution

• By using the density of the solution

• By using Avogadro's number

• By using the molecular weight

What is the definition of molarity?

• Moles of solute per kilogram of solvent

• Mass of solute per kilogram of solvent

• Moles of solute per liter of solution

• Mass of solute per liter of solution

Which parameter changes with temperature increase in a solution?

• Volume of solution

• Mass of solvent

• Moles of solute

• Mass of solute

Why is molality preferred over molarity for colligative properties?

• Molality is easier to measure

• Molality is a more accurate measure

• Molality does not change with temperature

• Molality changes with temperature