Book: KE & R: 18

Question 1

Defining the acid-dissociation constant.

Answer 1

K_a = [H3O+] [A-] / [HA]

Question 2

Defining the ion-product constant for water.

Answer 2

K_w = [H3O+] [OH-] = 1.0 × 10^-14 at 25 ºC

Question 3

Defining pH.

Answer 3

pH = - log [H3O+]

Question 4

Relating pK_w to pH and pOH.

Answer 4

pK_w = pH + pOH = 14.00 at 25 ºC

Question 5

Finding the % dissociation of HA.

Answer 5

Percent HA dissociated = 100 × [HA_dissoc] / [HA_init]

Question 6

Defining the base-dissociation constant.

Answer 6

K_b = [BH+] [OH-] / [B]

Question 7

Expressing the relationship among K_a, K_b, and K_w.

Answer 7

(K_a)(K_b) = K_w