New Reduction Methods in Volumetric Analysis a Monograph
New Reduction Methods in Volumetric Analysis a Monograph
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C. Contain therefore 0*3376 grm. Orange G, and the wool has taken up 0-6 - 0'3376 = 0-1624 grm. = 16-24 % Method II. Many of the azo dyes which are precipi- tated by hydrochloric acid can be titrated directly in the presence of Eochelle salt.
A known weight of the dyestuff is dissolved in water, and a definite volume of the solution, together with a solution of Eochelle salt, is titrated with titanous chloride.
The process has been found useful in the valuation of Diamine black, Diamine violet,... Benzo green, etc. , and we have used it successfully for pure Benzopurpurin and Erika, but commercial samples of these two dyestuffs do not always give distinct end reactions, and the indirect method (III. ) of titrating azo dyes is to be preferred for their exact valuation.
EXAMPLE. 1 grm. Diamine black B. H. Was dissolved in water and made up to 250 c. C. 50 c. C. Colour solution with 25 c. C. Rochelle salt (20%) required 18-9 c. C. TiCl 3 .
1 c. C. TiCl s = 0-001742 grm. Fe 960 C 34 H 24 14 N 6 S 4 Na 4 = 448 Fe The solution contains therefore 0^001742x960^ 18-9 x5 =Q .
What to read after New Reduction Methods in Volumetric Analysis a Monograph?
You can find similar books in the "Read Also" column, or choose other free books by Edmund Knecht to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
C. Contain therefore 0*3376 grm. Orange G, and the wool has taken up 0-6 - 0'3376 = 0-1624 grm. = 16-24 % Method II. Many of the azo dyes which are precipi- tated by hydrochloric acid can be titrated directly in the presence of Eochelle salt.
A known weight of the dyestuff is dissolved in water, and a definite volume of the solution, together with a solution of Eochelle salt, is titrated with titanous chloride.
The process has been found useful in the valuation of Diamine black, Diamine violet,... Benzo green, etc. , and we have used it successfully for pure Benzopurpurin and Erika, but commercial samples of these two dyestuffs do not always give distinct end reactions, and the indirect method (III. ) of titrating azo dyes is to be preferred for their exact valuation.
EXAMPLE. 1 grm. Diamine black B. H. Was dissolved in water and made up to 250 c. C. 50 c. C. Colour solution with 25 c. C. Rochelle salt (20%) required 18-9 c. C. TiCl 3 .
1 c. C. TiCl s = 0-001742 grm. Fe 960 C 34 H 24 14 N 6 S 4 Na 4 = 448 Fe The solution contains therefore 0^001742x960^ 18-9 x5 =Q .
What to read after New Reduction Methods in Volumetric Analysis a Monograph?
You can find similar books in the "Read Also" column, or choose other free books by Edmund Knecht to read onlineMoreLess
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