FREEPORT SULPHUR CO. BARATARIA BAY MODEL TESTS 

 h October 19^9 ACID AND WATER DENSITY* ADJUSTMENTS 



Two l+-liter Ehrlenmeyer flasks prepared with 3-*+ liters of 

 Dil. Er,SO\. as follows: 



1. La6el6d "200:1" containing approximately 0.1 N HpSO^ + Brom 

 Gresol Green sp.gr, = 1.006 at 60^F 



2. Labeled "1000:1" containing approximately 0,5^ H 2S0i^ + Brom 

 Cresol Green sp.gr* » 1.033 at 60°? 



average sp.gr. of prototype Point VI 1.057 

 bleed water Point VIII 1,02^ 

 at 60OF raw 



average sp.gr. of ambient water at 60 F 1.012 



Difference 0,033s equivalent ^^ 



=0,033 gm/cc, 

 1 +A f 5 5^ NaCl solution f = 1.033 gm/cc, 

 Sp.gr. of "1000:1" acid solution at 60°P = 1.033 without 

 adjustment but "200:1" sp.gr, was 1,006, Increased specific 

 gravity of "200:1" solution by adding NagS^crystals until 

 hydrometer read sp.gr, = 1.033 at 60oP, Equivalent ^ ^ 

 tor both solutions 0,033 gm/cc, greater than ambient water 

 of density 1,000 gm/cc. 



Additional solutions made up for titration control during tests, 



1, Intermediate standard HoSOi,. solution approximately 0,01 N, 



= "200:1" solution cut nominally 10:1, 



2, Reference Na2C0o solution approx, 0.2 N for comparison of 



acid solutions'; 

 Titration of "200:1" solution and 1/10 cut "200:1" solution 

 showed actual cut to be 9.9^+11 



Titration of "1000:1" solution and 1/50 cut "1000:1" solution 

 showed actual cut to be 50i2:l 



Thus dilution factor nominally "200:1" is 



(50 cc volume sample of ambient Gulf water) 



9.9^ x.^ in fact, 



(volume intermediate standard acid to neutralize 



Gulf sample) 



and dilution factor nominally "1000:1" is 



(50 cc volume sample of ambient Gulf water) 



50,2 x.^ in fact, 



(volume intermediate standard acid to neutralize 



Gulf sample) 



^Density is ordinarily considered in model theory but in practice 

 specific gravity is the quantity most conveniently measured. 

 Therefore, density in each case was measured in terms of specific 

 gravity at 60°F, The results are numerically equivalent to 

 density but differ dimens ionally as indicated. 



