Hydronium, Hydroxide, and the pH Scale (16.1.2)

Question 1

• A proton (H+) can be solvated by varying numbers of water molecules; hydronium ion (H3O+) is the simplest expression of this hydration.

Answer 1

• A proton (H+) can be solvated by varying numbers of water molecules; hydronium ion (H3O+) is the simplest expression of this hydration.

Question 2

• The dissociation constant of water (Kw) represents the self-ionization of water (H2O splitting into H+ and OH– ) and has a value of 1 x 10–14 at room temperature
(25˚C).

Answer 2

• The dissociation constant of water (Kw) represents the self-ionization of water (H2O splitting into H+ and OH– ) and has a value of 1 x 10–14 at room temperature
(25˚C).

Question 3

• The pH of a solution is the negative logarithm of its hydronium ion concentration.

Answer 3

• The pH of a solution is the negative logarithm of its hydronium ion concentration.