Understanding the Dissolution of Ionic Compounds

What is the angle between the bonds in a water molecule?

• 90 degrees

• 104.5 degrees

• 120 degrees

• 180 degrees

What type of forces are formed between water molecules and ions during dissolution?

• Van der Waals forces

• Hydrogen bonds

• Ion-dipole forces

• Covalent bonds

Which of the following best describes the dissolution process?

• The crystal remains unchanged

• Ions are formed into a new crystal

• Ions are surrounded and separated by water molecules

• Water molecules are absorbed into the crystal

How is solubility typically expressed in chemistry?

• In grams per cubic meter

• In liters per mole

• In moles per liter

• In grams per milliliter

What does it mean when a solution is saturated?

• It can dissolve more solute

• It has reached its maximum solubility

• It is a mixture of gases

• It is completely evaporated

Which of the following is considered soluble?

• A compound dissolving more than 0.1 moles per liter

• A compound dissolving less than 0.01 moles per liter

• A compound that does not dissolve at all

• A compound that forms a precipitate

How does temperature generally affect the solubility of solids?

• Solubility increases with increasing temperature

• Solubility is unaffected by temperature

• Solubility remains constant with temperature changes

• Solubility decreases with increasing temperature

What happens to the solubility of gases as temperature increases?

• It increases

• It fluctuates randomly

• It decreases

• It remains the same

Why do gases become less soluble as temperature increases?

• They form stronger bonds with water

• They gain kinetic energy and escape the solution

• They react with water to form new compounds

• They condense into a liquid

What is the primary reason for the increase in solubility of solids with temperature?

• Decrease in entropy

• Increase in particle vibrations

• Formation of new chemical bonds

• Decrease in water density