Exploring Acids and Bases: Key Concepts and Corrections

What does the Arrhenius concept state about acids?

• Acids produce hydrogen ions.

• Acids donate hydroxide ions.

• Acids donate electrons.

• Acids accept hydrogen ions.

According to the Bronsted-Lowry concept, what is a base?

• A proton donor

• A hydroxide ion producer

• An electron acceptor

• A proton acceptor

What is an amphoteric species?

• A species that can only donate protons.

• A species that can only accept protons.

• A species that can either donate or accept protons.

• A species that does not participate in acid-base reactions.

What does a conjugate base result from?

• A base losing a proton

• An acid losing a proton

• A base gaining a proton

• An acid gaining a proton

What is the pH of a solution with a hydrogen ion concentration of 1.0 x 10^-7 M?

• 0

• 14

• 7

• 1

What does the pH scale technically measure?

• The logarithm of the hydroxide ion concentration

• Hydroxide ion concentration

• Hydronium ion concentration

• The negative logarithm of the hydrogen ion concentration

What is the relationship between pH and pOH in a neutral solution at 25°C?

• pH + pOH = 7

• pH + pOH = 14

• pH = pOH

• pH - pOH = 7

What happens to the value of Kw as the temperature increases?

• It becomes zero.

• It decreases.

• It increases.

• It remains constant.

What is the significance of the water autoionization constant (Kw)?

• It determines the strength of an acid or base.

• It is the equilibrium constant for the autoionization of water.

• It represents the concentration of water molecules.

• It indicates the pH of pure water.

How does the pH of water change with temperature?

• It decreases as temperature increases.

• It remains constant regardless of temperature.

• It increases as temperature increases.

• It fluctuates unpredictably with temperature.