'2!>2 Linhart — Hydrolysis of Metallic Alkyl Sulphates. 





B 



= 0-5 N HC1 





23-0 



0*0482 



0-0207 



0-00604 



66-5 



0-1344 



0-0576 



0-00592 



113-5 



0-2200 



0-0943 



0-00575 



169-0 



0-3208 



0-1374 



0-00574 



200-0 



0-3744 



0-1604 



0-00575 



250-0 



0-4575 



0-1900 



0-00574 



326-5 



0-5734 



0-2457 



0-00572 



QC 



0-7002 



0-3000 







B = 1-0N HC1 





44-0 



0-2316 



0-0992 



0-00684 



92-0 



0-4574 



0-1960 



0-00687 



138-0 



0-6452 



0-2764 



0-00686 



164-0 



0-7394 



0-3168 



0-00685 



a 



0-8100 



0.3470 = A 

 Table II. 







K for Esters in 1-0 N HC1 





Ba(CH s S0 4 ) 2 





Ba(C 2 H s S0 4 ) 2 



Ba(C 3 H 7 S0 4 ) 2 



0-00852 





0-00828 



0-00684 



0-00852 





0-00828 



0-00687 



0-00852 • 





0-00828 



0-00686 



0-00849 





0-00835 



0-00685 



(A = 0-2970) 





0-00828 (A: 

 0-00832 



= 0-3470) 





(A 



= 0-3000) 





Summary. — The following conclusions are drawn from the 

 experimental results : 



1. Alkyl barium sulphates and alkyl sulphuric acids decom- 

 pose extremely slowly in water solution even at moderately 

 high temperatures. 



2. The rate of decomposition of the salts is decreased with 

 the increase m the molecular weight of the alkyl group, as is 

 shown in Table II. 



3. The inclusion of impurities is greater the larger the 

 molecular weight of the alkyl group. 



4. Fair velocity constants are obtained on the hypothesis 

 that alkyl barium sulphates and the corresponding alkyl sul- 

 phuric acids are esters of similar stability in the presence of 

 aqueous hydrochloric acid. 



Experimental results have been obtained on the hydrolysis 

 in acid solution of the calcium and strontium esters and also of 

 the alkyl sulphuric acids, and in alkaline solution of the 

 sodium, strontium and barium esters. These results will be 

 published in subsequent papers. 



