ON THE STRENGTH OF ACETIC ACID. J^T 



acid of the experiment, before I had added 112*2 gr. of 

 water to the 14" l() gr. it contained at first. 



The following- table represents the experiment made on 

 110 gr, of acetic acid, No. 1, indicating 9° on the areome- 

 ter at the teajperature of 12*5° R. [Go-T^.], its specific 

 gravity being I -063, and 100 parts saturating 250 of well 

 crj'stallized subcarbonate of soda. 



No. 



W^ter added. 



Areometer. 



Specific gray. 



I'abulal 



1 



10 • gr. 



■ lO-G" 



1-0742 



rcsulis. 



2 



12-25 



11 



l-077f> 





3 



10 



11-3 



l'079l 





4 



10-5 



10-9 



1-0763 





5 



12 



10-6 



1-0742 





6 



11-5 



10-4 



1-0728 





7 



31* 



9-4 



1-0658 





s 



I) 



9-1 



1-0637 





9 



37* 



9 



1-0630 





112-2 



Each addition of water to tlie mixture produce an in- Temperatura 

 crease of temperature, which I allowed to go off, noting [ai^^^^*^ ^j^*^*- 

 the terms of the experii.icnt only at the temperature of '^ 



.12-5° [60 r]. 



A distinct experiment on 100 gr. of the acid No. 1, to 

 which I added 102 gr. of distilled water, fhowed a rise of 

 temperature equal to 3° R. [6.75° F.]. I added at first 

 29'54 gr. of water, which rose the temperature from 12"5°' 

 to 13 '5°. I then added 72-46 gr. of water, which raised it 

 from 13-5" to 15-5°. 



From what has been said we may conclude. General cou' 



1st, That the rise of the areometer indicates tlie strength elusions. ., 

 of the acetic acid, till the mixture is composed of 67-25614 

 acid and 32*74386 water. This term, at the temperature 

 of 12*5° R. [60-1° F.], is expressed by 113 on the areome- 

 ter, and its specific gravity is ]*07jJl. 



2dly, That the strengtli of the acetic acid from 11-3° Is 

 indicated by the regular descent of the areometer on the 

 mixture f. 



* I have copied tha table exactly from the original, but the total would 

 make 145-.25, consequently there rnust be an errour of S3 in excess 

 somewhere, and i)robab!y it is in the tw» numbers 31 and 37. C. .^ 



f 1 have repeated sonie of the experiments given in this paper, aii'l 

 niv results differed bat liltle from those here described. Be.thollef. 



