DEC. 4, 1921 



WELLS : WATER OE BORAX LAKE 



479 



The cur\^es shown in the figure are drawn to pass through the 

 observational data and also approximately parallel to the curves 

 for the corresponding buffer mixtures in pure water. ^ The effect 



TABLE 1 

 Results of p^ Determinations Made after Adding Carbonate and Borate Buffers 

 TO AN Artificial I/AKE Water. Total C02= 4.26 g. per Liter. Total Bo03 = 1.62 g. 



PER Liter 



Percentage of total B2O3 

 present as Na2B204 ^jj 



50 9.42 



70 9.74 



80 9.95 



90 10.27 



of the salt in Borax Lake water seems to be about 45 and 75 per cent 

 of that in Searles Lake brine in decreasing the p^ values for the car- 



10.8 



10.6 



10.4 



101 



T 



8.8 



20 



80 



100 



^0 60 



Per Cent 



Fig. 1. pH for mixtures of NaHCOa and Na2C03, and of Na2B407 and Na2B204 in an artificial 

 brine resembling Borax Lake water. Curve 1 : per cent of total CO2 present as Na2C03 

 (balance NaHCOs). Curve 2: per cent total B2O3 present as Na2B204 (balance Na2B407) . 

 8 Data given in Prideaux, The theory and use oj indicators, pp. 279 and 299. 



