Understanding Water as an Amphoteric Substance

What is the term used to describe a substance that can act as both an acid and a base?

• Isotonic

• Hypertonic

• Amphoteric

• Hypotonic

In the ionization of water, what ions are produced?

• Ammonium and nitrate ions

• Hydronium and hydroxide ions

• Sodium and chloride ions

• Carbonate and bicarbonate ions

What is the concentration of hydrogen ions in pure water at 25 degrees Celsius?

• 1.0 x 10^-10 moles per liter

• 1.0 x 10^-4 moles per liter

• 1.0 x 10^-14 moles per liter

• 1.0 x 10^-7 moles per liter

What is the ion product constant (Kw) for water at 25 degrees Celsius?

• 1.0 x 10^-4

• 1.0 x 10^-14

• 1.0 x 10^-10

• 1.0 x 10^-7

If the concentration of hydroxide ions in a solution is greater than that of hydrogen ions, what is the nature of the solution?

• Acidic

• Neutral

• Basic

• Amphoteric

How do you calculate the hydrogen ion concentration if the hydroxide ion concentration is known?

• Multiply the hydroxide ion concentration by Kw

• Divide Kw by the hydroxide ion concentration

• Subtract the hydroxide ion concentration from Kw

• Add the hydroxide ion concentration to Kw

In a solution where the hydrogen ion concentration is 4.239 x 10^-2 moles per liter, what is the nature of the solution?

• Amphoteric

• Neutral

• Acidic

• Basic

What happens to the hydroxide ion concentration if the hydrogen ion concentration increases?

• It increases

• It becomes zero

• It remains the same

• It decreases

If a solution has equal concentrations of hydrogen and hydroxide ions, what is its nature?

• Basic

• Neutral

• Acidic

• Amphoteric

What is the hydroxide ion concentration in a neutral solution at 25 degrees Celsius?

• 1.0 x 10^-10 moles per liter

• 1.0 x 10^-4 moles per liter

• 1.0 x 10^-14 moles per liter

• 1.0 x 10^-7 moles per liter