Western Mill And Smelter Methods of Analysis a Practical Laboratory Handbook Fo
Western Mill And Smelter Methods of Analysis a Practical Laboratory Handbook Fo
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Fifty cc. Of the cyanide solu- tion are taken, and 5 cc. Of the above indicator added. The liquid is titrated with standard AgNO 3 (6. 519 grams per litre) until a distinct yellow coloration is obtained, disregarding any white turbidity. This lat- ter may sometimes be removed by adding NH 4 OH, MILL AND SMELTER METHODS. 65 which in moderate amounts does not affect the ac- curacy of the test : i cc. Of AgNO 3 used equals . 01% KCN (equiva- lent to total cyanide).
7. Estimation of HCN* Estimation... of free HCN in presence of alkaline cyanides and of zinc double cyanides : (a) The free cyanide is first estimated in the or- dinary way without addition of alkali. It is assumed that the presence of free HCN does not affect this te- sult.
(b) Another portion of the liquid is mixed with a solution of potassium or sodium bi-carbonate con- taining no normal carbonate or free CO 2 . The mix- ture is titrated with AgNO 3 as before, the reaction as regards HCN being: 2HKC0 3 +AgN0 3 +2 HCN KAg(CN) 2 +KN O 3 +2 CO 2 +2 H 2 O.
What to read after Western Mill And Smelter Methods of Analysis a Practical Laboratory Handbook Fo?
You can find similar books in the "Read Also" column, or choose other free books by Philip Henry Argall to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Fifty cc. Of the cyanide solu- tion are taken, and 5 cc. Of the above indicator added. The liquid is titrated with standard AgNO 3 (6. 519 grams per litre) until a distinct yellow coloration is obtained, disregarding any white turbidity. This lat- ter may sometimes be removed by adding NH 4 OH, MILL AND SMELTER METHODS. 65 which in moderate amounts does not affect the ac- curacy of the test : i cc. Of AgNO 3 used equals . 01% KCN (equiva- lent to total cyanide).
7. Estimation of HCN* Estimation... of free HCN in presence of alkaline cyanides and of zinc double cyanides : (a) The free cyanide is first estimated in the or- dinary way without addition of alkali. It is assumed that the presence of free HCN does not affect this te- sult.
(b) Another portion of the liquid is mixed with a solution of potassium or sodium bi-carbonate con- taining no normal carbonate or free CO 2 . The mix- ture is titrated with AgNO 3 as before, the reaction as regards HCN being: 2HKC0 3 +AgN0 3 +2 HCN KAg(CN) 2 +KN O 3 +2 CO 2 +2 H 2 O.
What to read after Western Mill And Smelter Methods of Analysis a Practical Laboratory Handbook Fo?
You can find similar books in the "Read Also" column, or choose other free books by Philip Henry Argall to read onlineMoreLess
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