Question

The pH of an aqueous solution of 0.433 M acetic acid is

The pH of an aqueous solution of 0.433 M triethylamine (a weak base with the formula (C₂H₅)₃N) is  

Answer 1

(1)

Question:

The pH of an aqueous solution of 0.433 M acetic acid is

For acetic acid, the acid dissociation constant

Initial concentration (M)	0.433	0	0
Change in concentration (M)	-x	x	x
Equilibrium concentration (M)	0.433-x	x	x

The acid dissociation constant

Since the value of Ka is small, we approximate 0.433-x to 0.433.

(2)

Question:

(2)

Question:

The pH of an aqueous solution of 0.433 M triethylamine (a weak base with the formula (C2H5)3N) is

For triethylamine, the base dissociation constant

Initial concentration (M)	0.433	0	0
Change in concentration (M)	-x	x	x
Equilibrium concentration (M)	0.433-x	x	x

The base dissociation constant

Since the value of Kb is small, we approximate 0.433-x to 0.433.