Self Ionization of Water

What is the definition of self ionization of water?

• The self ionization of water is the process in which water molecules dissociate into oxygen ions (O2-) and hydrogen ions (H+).

• The self ionization of water is the process in which water molecules dissociate into hydrogen ions (H+) and oxygen ions (O2-).

• The self ionization of water is the process in which water molecules dissociate into hydrogen ions (H+) and hydronium ions (H3O+).

• The self ionization of water is the process in which water molecules dissociate into hydrogen ions (H+) and hydroxide ions (OH-).

What is the process called when water molecules dissociate into ions?

• ionization

• evaporation

• condensation

• vaporization

What are the two ions formed during the self ionization of water?

• H+ and O2-

• H3O+ and OH-

• H2O+ and OH-

• H2O and O2-

What is the chemical equation for the self ionization of water?

• H2O ⇌ H2+ + O-

• H2O ⇌ H- + OH+

• H2O ⇌ H+ + OH-

• H2O ⇌ H+ + OH

What is the concentration of H+ ions in pure water at 25°C?

• 1 x 10^-7 M

• 1 x 10^-6 M

• 1 x 10^-8 M

• 1 x 10^-9 M

What is the value of Kw, the ion product constant for water at 25°C?

• 1.0 x 10^-15

• 1.0 x 10^-12

• 1.0 x 10^-14

• 1.0 x 10^-13

Does the self ionization of water increase or decrease with temperature?

• decrease

• stay the same

• fluctuate

• increase

What is the significance of self ionization of water in acid-base chemistry?

• Determines the concentration of hydrogen and oxygen ions

• Causes the formation of salts

• Determines the concentration of hydronium and hydroxide ions

• Increases the pH of a solution