Term 3 Week 4 Quiz

Which type of substance generally dissolves more readily in water due to strong ion-dipole interactions?

• Non-polar molecular substances

• Ionic substances

• Metallic substances

• Covalent network substances

What is the primary intermolecular force between water molecules and ionic compounds?

• London dispersion forces

• Hydrogen bonding

• Ion-dipole forces

• Dipole-dipole forces

True or False: The solubility of most solid solutes in water increases as temperature increases.

• True

• False

How does the solubility of gases in water generally change as temperature increases?

• Increases

• Decreases

• Remains constant

• First increases, then decreases

Match the following substances to their likely solubility in water: 1. Sodium chloride 2. Hexane 3. Glucose

• 1: Soluble, 2: Insoluble, 3: Soluble

• 1: Insoluble, 2: Soluble, 3: Insoluble

• 1: Soluble, 2: Soluble, 3: Insoluble

• 1: Insoluble, 2: Insoluble, 3: Soluble

What type of intermolecular force is primarily responsible for the solubility of molecular substances like glucose in water?

• Ion-dipole forces

• Hydrogen bonding and dipole-dipole forces

• Metallic bonding

• Covalent bonding

A solubility curve shows the solubility of potassium nitrate (KNO_3) increases with temperature. What does this indicate?

• KNO_3 is less soluble at higher temperatures

• KNO_3 is more soluble at higher temperatures

• KNO_3 decomposes at higher temperatures

• KNO_3 is insoluble in water

Which of the following statements is true regarding the effect of temperature on the solubility of most gases in water?

• Solubility increases with temperature

• Solubility decreases with temperature

• Solubility is unaffected by temperature

• Solubility is highest at 100°C

If a solution contains more dissolved solute than is predicted by its solubility at a given temperature, it is:

• Unsaturated

• Saturated

• Supersaturated

• Dilute

Fill in the blank: Water’s polarity allows it to ______ ions through ion-dipole interactions, making many ionic compounds soluble.