Table 2.

Dissociation constant of pentachlorophenol in aqueous solution at 25 °C

Phenol concentration 1.69 × 10 −5M, cell length 10 cm, wavelength 320 mμ., D1, 0.015, D2, 0.823
I	P(α h γ ci)	D	$\log \frac{D-D_1}{D_2-D}$	pK	pK (corr)
0.040	4.851	0.435	0.034	4.817	4.816
.064	4.838	.426	.015	4.823	4.822
.096	4.827	.422	.006	4.821	4.821
.144	4.814	.415	−.009	4.823	4.823
.200	4.802	.411	−.017	4.819	4.819

The buffer solution contained sodium hydrogen succinate (m) and sodium chloride (m). I = 2m.