A system of instruction in quantitative chemical analysis / by C. Remigius Fresenius.
- Fresenius, C. Remigius, 1818-1897. Anleitung zur qualitativen chemischen Analyse. English
- Date:
- 1854
Licence: Public Domain Mark
Credit: A system of instruction in quantitative chemical analysis / by C. Remigius Fresenius. Source: Wellcome Collection.
609/680 page 589
![56. Determination of baryta by precipitation with car- BONATE OF AMMONIA (to § 79, 2. «.). 07553 grm. of pure ignited chloride of barium were precipitated ac- cording to the directions of § 79, 2, a.; the precipitate of Ba O, C02 weighed 0*7142 grm., which corresponds to 0*554719 of Ba 0 = 73 44 per cent (100 parts of Ba CI ought to have given 73*59 parts). The re- sult accordingly was 99*79 instead of 100. 57. Determination of baryta in organic salts (to § 79, 2, b.). 0*686 grm. of paratartrate of baryta [2 (Ba O, R) + 5 aq], treated ac- cording to the directions of § 79, 2, b., gave 0*408 grm. of carbonate of baryta = 0*3168936 of Ba 0=46*20 per cent (calculated 46*36 per cent), which gives 99*61 instead of 100. 58. Determination of strontia as sulphate of strontia (to § 80, 1.). a. An aqueous solution of 1*2398 grm. of SrCl was precipitated with SO 3 in excess, and the precipitated sulphate of strontia washed with water. It weighed 1*4113 grm., which corresponds to 0*795408 grm. of Sr O = 64*15 per cent (calculated 65*38 per cent) ; this gives 98*12 in- stead of 100. b. 1*1510 grm. of SrO, C02 was dissolved in hydrochloric acid in excess, the solution diluted, and then precipitated with S03 ; the precipitated SrO, S03 was washed with water; it weighed 1*4024 grm. = 0*79039 SrO = 68*68 per cent (calculated 70*07 per cent) ; this gives 98*02 in- stead of 100. 59. Determination of strontia as sulphate, with correc- tion (to § 80, 1.). The filtrate obtained in tbe experiment described 58, b., weighed 190*84 grammes. According to experiment No. 21, 11862 parts of w'ater con- taining sulphuric acid dissolve one part of sulphate of strontia. 190*84 grammes of the filtrate contain therefore 0*0161 grm. of that salt in solution. The washing water weighed 63*61 grammes. According to experiment No. 20, 6895 parts of water dissolve one part of SrO, S03 ; the 63*61 grammes of washing water contain therefore 0*0092 grm. Adding 0*0161 and 0*0092 gramme to the 1*4024 gramme of precipi- tated sulphate of strontia, we find the total amount = 1*4277 gramme, which corresponds to 0*80465 of SrO = 69*91 per cent in SrO, CO., (calculated 70*07 per cent); this gives 99*77 instead of 100. 60. Determination of strontia as carbonate of strontia (to § 80, 2.). 1*3104 of chloride of Strontium, precipitated according to the direc-](https://iiif.wellcomecollection.org/image/b28133742_0609.jp2/full/800%2C/0/default.jpg)
