Understanding the Autoionization of Water

What is the primary question to consider when studying the properties of water in chemistry?

• Is water an acid or a base?

• Is water a good solvent?

• Does water conduct electricity?

• Is water a solid or a liquid?

What does it mean for a molecule to be amphoteric?

• It can act as both an acid and a base.

• It can only act as a base.

• It can only act as an acid.

• It cannot participate in any reactions.

In the reaction between two water molecules, what is the charge of the hydronium ion formed?

• No charge

• Neutral

• Positive

• Negative

When water reacts with a strong acid like HCl, what role does water play?

• Water does not participate in the reaction.

• Water acts as an acid.

• Water acts as a base.

• Water acts as a solvent.

What is the equilibrium constant expression for the autoionization of water?

• Kw = [H+][OH-] / [H2O]

• Kw = [H2O] / [H+][OH-]

• Kw = [H2O]

• Kw = [H+][OH-]

At 25 degrees Celsius, what is the value of Kw for water?

• 1 x 10^-10

• 1 x 10^-4

• 1 x 10^-7

• 1 x 10^-14

How do you calculate the pH of a solution if you know the concentration of H+ ions?

• pH = [OH-]/[H+]

• pH = [H+]/[OH-]

• pH = log[H+]

• pH = -log[H+]

What is the relationship between pH and pOH in a solution?

• pH + pOH = 0

• pH + pOH = 1

• pH + pOH = 7

• pH + pOH = 14

In a neutral solution at 25 degrees Celsius, what is the pH value?

• 7

• 0

• 14

• 1

If the pH of a solution is 7, what can be said about the concentrations of H+ and OH- ions?

• H+ concentration is greater than OH- concentration.

• OH- concentration is greater than H+ concentration.

• H+ concentration is zero.

• H+ and OH- concentrations are equal.