Qualitative Analysis for Secondary Schools
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In our eReader you can find the full English version of the book. Read Qualitative Analysis for Secondary Schools Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Qualitative Analysis for Secondary Schools
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Add HC1.
Pp. Yellow As 2 S 3 and As 2 S 5 (S#), As pres. Confirm by drying pp. , mixing with Na 2 C0 3 and KCN, and heating in bulb tube. Arsenic mirror on upper part of tube, As pres.
Notes and Suggestions The precipitation of S, on addition of HC1, must not be mistaken for this group. Sulphur will precipitate, white, when HC1 is added to (NH 4 ) 2 S. This difficulty can be overcome in part by using small quantities of (NH 4 ) 2 S. When heating solution A with an iron nail, a precipitate may b...e due to carbon from the iron, or metallic Sb from the reducing action of nascent H, or particles of undissolved iron. In the case of the battery 48 BASIC ANALYSIS action in solution B, if enough Zn is used to neutralize all acid and the action is carried to completion, most of the Sn will be deposited with Sb on the Pt foil. The Sn may be dissolved off with HC1 and warm H 2 O as SnCl 2 . Sb is undissolved. This test for Sn serves as a check on the preceding test. The (NH 4 ) 2 CO 3 should not contain much NH 4 OH, as its presence will dissolve traces of SnS and Sb 2 S 3, and thus make necessary the confirmatory test for As, with Na 2 CO 8 and KCN.
What to read after Qualitative Analysis for Secondary Schools?
You can find similar books in the "Read Also" column, or choose other free books by Cyrus Wendell Irish to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Add HC1.
Pp. Yellow As 2 S 3 and As 2 S 5 (S#), As pres. Confirm by drying pp. , mixing with Na 2 C0 3 and KCN, and heating in bulb tube. Arsenic mirror on upper part of tube, As pres.
Notes and Suggestions The precipitation of S, on addition of HC1, must not be mistaken for this group. Sulphur will precipitate, white, when HC1 is added to (NH 4 ) 2 S. This difficulty can be overcome in part by using small quantities of (NH 4 ) 2 S. When heating solution A with an iron nail, a precipitate may b...e due to carbon from the iron, or metallic Sb from the reducing action of nascent H, or particles of undissolved iron. In the case of the battery 48 BASIC ANALYSIS action in solution B, if enough Zn is used to neutralize all acid and the action is carried to completion, most of the Sn will be deposited with Sb on the Pt foil. The Sn may be dissolved off with HC1 and warm H 2 O as SnCl 2 . Sb is undissolved. This test for Sn serves as a check on the preceding test. The (NH 4 ) 2 CO 3 should not contain much NH 4 OH, as its presence will dissolve traces of SnS and Sb 2 S 3, and thus make necessary the confirmatory test for As, with Na 2 CO 8 and KCN.
What to read after Qualitative Analysis for Secondary Schools?
You can find similar books in the "Read Also" column, or choose other free books by Cyrus Wendell Irish to read onlineMoreLess
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