Thou Shalt Not Forget Unit 9

What is a solution?

• A homogeneous mixture

• A heterogeneous mixture

• A compound

• A suspension

What is the solute in a solution?

• The dissolving medium

• The compound

• The dissolved substance

• The mixture

What is the solvent in a solution?

• The dissolved substance

• The dissolving medium

• The mixture

• The compound

What is the formula for molarity?

• (moles of solute + moles of solvent)/(moles of solute)

• (moles of solute + moles of solvent)/(L of solution)

• (moles of solute)/(moles of solvent)

• (moles of solute)/(L of solution)

Tags

NGSS.HS-PS1-5

What is the formula for mole fraction?

• (moles of solute)/(L of solution)

• (moles of solute)/(moles of solute + moles of solvent)

• (moles of solute + moles of solvent)/(L of solution)

• (moles of solute + moles of solvent)/(moles of solute)

Tags

NGSS.HS-PS1-5

What is the heat of solution?

• The amount of heat energy released when a solvent dissolves in a solute

• The amount of heat energy absorbed when a solvent dissolves in a solute

• The amount of heat energy released when a solute dissolves in a solvent

• The amount of heat energy absorbed when a solute dissolves in a solvent

What does Raoult's Law state?

• The vapor pressure of a solution is inversely proportional to the amount of solute in the solution

• The vapor pressure of a solution is directly proportional to the amount of solvent in the solution

• The vapor pressure of a solution is directly proportional to the amount of solute in the solution

• The vapor pressure of a solution is inversely proportional to the amount of solvent in the solution

Why does the vapor pressure of a solution decrease compared to the pure solvent?

• Solute particles increase the rate of vaporization, leading to a decrease in vapor pressure

• Solute particles replace some of the solvent molecules at the surface, reducing the rate of vaporization

• Solute particles have a higher vapor pressure than the solvent, causing a decrease in vapor pressure

• Solute particles have a lower vapor pressure than the solvent, causing a decrease in vapor pressure

What is the impact of dissociation on the vapor pressure of a solution?

• Dissociation of ionic compounds has a greater impact on the vapor pressure compared to nonionic solutes

• Dissociation of ionic compounds decreases the vapor pressure

• Dissociation of ionic compounds increases the vapor pressure

• Dissociation of ionic compounds has no impact on the vapor pressure