The Students' Guide in Quantitative Analysis - Free Ebooks Library
The Students' Guide in Quantitative Analysis - Free Ebooks Library
The Students' Guide in Quantitative Analysis - Free Ebooks Library
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THE<br />
STUDENTS' GUIDE<br />
irt<br />
QUANTITATIVE ANALYSIS.<br />
Amlysis No. I.— Baric Chloride.<br />
BaCU + 2H,0.<br />
A, — Determ<strong>in</strong>ation of Chloriii©.<br />
See Fies, Quant, Anal., | 141. L a, and pages 790 to<br />
795. (References are to Fresenius' QimuUiaiivc An^fysts,<br />
American edition, tS8i.)<br />
r\ a<br />
Weigh out 0,8 to I grm. of powdered BaC^-f sH.O and<br />
dissolve <strong>in</strong> cold water <strong>in</strong> a beaker ; add a slight excess of<br />
AgNOj previously acidulated with HNO3; stir well, and<br />
warm. When the precipitate of AgCl has entirely settled,<br />
and the supernatant liquid is quite clear, pour off through<br />
a No. 2 filter; then add boil<strong>in</strong>g water slightly acidulated<br />
with HNO3, to the precipitate <strong>in</strong> the beaker; stir, and.<br />
after the precipitate has settled aga<strong>in</strong>, pour off through<br />
the filter.<br />
Cont<strong>in</strong>ue this wash<strong>in</strong>g by decantation three or<br />
four times; then br<strong>in</strong>g the precipitate on the filter by<br />
means of a glass rod qv a feather ; wash it down <strong>in</strong>to the<br />
po<strong>in</strong>t of the filter; wash laistly with a little non-ackhfied<br />
water ; cover the funnel with paper ; label properly, and set<br />
aside to dry. Weigh a clean porcela<strong>in</strong> crucible; transtcr
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