Table 11.

Values of the standard potential of the mercury-mercurous sulfate electrode and of the standard cell (a=l) and the corresponding electromotive force of the saturated standard cell at 25 °C

(all values on V69 scale)
Date	Experimenters	Hg. Hg2SO4	Standard cell
		E°	E°	E(sat.)
		Volt	Volt	Volts
1910	Brϕnsted [93]	a, b 0.6170	0.96843	1.02004
1914	Lewis and Lacey [95]	.6129	.96433	1.01594
1918	Randall and Cushman [94]	c.6215	.97293	1.02454
1921	Ferguson and France [97]	b.6199	.97133	1.02294
1925	Harned and Sturges [98]	b.61534	.96677	1.01838
1926	Åkerlof [99]	b.6168	.96823	1.01984
1927	Randall and Langford [100]	d.6245	.97593	1.02754
1929	Randall and Stone [101]	b.61550	.96693	1.01854
1933	Trimble and Ebert [102]	b.6156	.96703	1.01864
1933	MacDougall and Blumer [103]	.6294	.98083	1.03244
1935	Harned and Hamer [79]	.61536	.96679	1.01840
1942	Müller and Reuther [104]	.6155	.96693	1.01854
I960	Beck. Dobson, and Wynne-Jones [105]	e.61582	.96725	1.01886
1965	Covington. Dobson, and Wynne-Jones [69]	.61251	.96394	1.01555
1969	Gardiner. Mitchell, and Cobble [67]	f.61251	.96394	1.01555
1970	Sharma and Prasad [107]	.6135	.96493	1.01564
Observed emf of standard cellg = 1.0184186

^aSee Randall and Cushman [94]; these authors reported necessary corrections for Brønsted’s data and reported some earlier results of Arthur Edgar who, however, measured his emfs only to 1 mV,

^bCalculated here from emfs for 0.05 to 0.21 m using activity coefficients of sulfuric acid given in reference [79].

^cGiven in Lewis and Randall [96].

^dStated to be a provisional value.

^eIves and Smith [106] listed this value as 0.61560 V − becomes 0.61561 V on V₆₉ scale; reason for discrepancy is unknown.

^fSelected by these authors in a recalculation of the activity coefficients of sulfuric acid, i.e., the 1965 value.

^gFor dc-electrolytic mercurous sulfate exclusively 1.0184354 V.