218 REPORT OF THE CHEMIST OF THE 
The value of 4 for hydrochloric acid was determined from the 
table given below. The series of resistances was taken by re- 
peated dilutions of the solution in the cell by means of calibrated 
pipettes, the series being checked by repetition and by duplicating 
the more dilute solutions with those made directly from N-105.8. 
TABLE I.—SHOWING VALUES OF A FOR HypROCHLORIC ACID. 




5905 
7. _ 25905 1698 | seg 
7 Ui =) , 
QUIVALENT VOLUME (VY) r=7 108 erence por ea 
tional. 
LOR RS ee 6 ee eee O44 le tere 106.1 
AULT Ree ee FA ee ee ee 4.724 213.1 Pi Pie 1.6 
AS A ee Be ae ee et eke ae eu eee 2.362 425.2 424.5 0.9 
346: Stine Bele fa eS OAs ee Lest 849.0 849.0 0.7 
L694) OF Pee ine tt ree aes ye 0.5905 1698.0 1698.0 0.0 



Calculating the constant of the formula from the resistance at 
the -highest dilution, we have c==% R==.5005 x 1606 ==loa4: 
which gives, as the formula, + == 19°33 — 2378K -, in which 
8g : : R-4 R-A (corrected for K)’ 
K equals capacity of cell based on the —_* unit of conductivity 
for electrolytes. 


Similarly the formula for sulphuric acid is found to be += nats 
the value of 4 being given below in Table II. 
For general use with cells of varrying capacities, it is convenient 
to prepare a table with values of R and 4 reduced to fit a cell of 
capacity equal to 1. The value of R and A are then transposed to fit 
a cell of any capacity, K’, simply by multiplying them all by K’, since 
X— K’. The values for sulphuric acid for a cell of unit 
K 
capacity are given in the following table (conductivity of water 
Rae mT LORE LS 
TABLE II.—SHOWING VALUES OF A-FOR SULPHURIC ACID WITH CELL OF 
Unit Capaciry. 



V z=] x 108 R A 
DED AAG nid ttl een Beige Oa oes ils ey on ee es 8 362.3 60.3 
EM stat a5, fe sin Eo & tine isde gles © soaks oe ede ate 4 678.4 74.4 
DOGR SOU Bales RRB E apie a's anes ie NER Ge ts, Gare ean ee 2 1,290 82 
LOOUIB,, See soi sonivie <'553)scack Sees eget acetal eee eae eS 1 2,498 82 
DOG s ie ac Scrat a as ere Mee iy spe eta nse eRe eee 0.5 4,888 57 
BOOM FO sc0-paiars 4 oem gpl 2 aug Roa ENS RENEe  nto fh cera ee 0.25 9,662 00 
BOO abi wins whi ar ncgaly BtereShatwls Siete abe ape ate he et cre 0.125 | 19,320 00 



