Ch 8: Solutions, Acids, and Bases

Which substance is a strong base?

• NaCl

• HCl

• H₂CO₃

• Ca(OH)₂

There are different ways substances can dissolve in water. Which process forms a solution that does NOT contain ions?

• dissociation

• dispersion

• ionization

• absorption

A saturated solution of carbon dioxide in water suddenly experiences an increase in pressure. What happens to the solution?

• Bubbles form as the carbon dioxide comes out of the water.

• It becomes supersaturated.

• It remains saturated.

• More carbon dioxide can now be dissolved in the water.

Compound X has a solubility of 20 g in 100 g of water at 20°C. What is the minimum amount of water (20°C) needed to dissolve 50 g of compound X?

• 250 g

• 100 g

• 500 g

• 200 g

Liquids that resist large changes in pH are

• electrolytes.

• buffers.

• polar.

• strong acids.

A solution with a pH of 1 is a

• strong acid.

• weak acid.

• strong base.

• buffer.

How could you increase the speed at which a solid dissolves in a liquid?

• Apply an electric current to the liquid.

• Cool the liquid.

• Crush the solid into finer pieces.

• Shine a light on the liquid.

Which factor does NOT influence solubility?

• pressure

• type of solvent

• temperature of solvent

• stirring

What is produced when an acid dissolves in water?

• hydroxide ions (HO–)

• hydronium ions (H₃O+)

• a salt

• a base

Which of the following correctly describes acids?

• They are proton acceptors.

• They taste bitter.

• They are used to make soaps.

• They react with metals.