A Systematic Qualitative Chemical Analysis a Theoretical And Practical Study of
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Of magnesia mixture (MgCl 2 -NH 4 Cl-NH 4 OH). Shake the contents vigor- ously and if no precipitate forms rub the walls of the tube with a glass rod and allow it to stand for some time. (See note, Preliminary Exp. I4a). The formation of a white crystalline precipitate indicates the presence of arsenic. Filter and confirm the arsenic by (42). (42) Confirmatory Test for Arsenic. Dissolve the precipitate of MgNH 4 AsO 4 (41) by pouring 5-10 cc. Of 6N. HC1 repeatedly through the filter. Heat the s...olu- tion to boiling and pass H 2 S into it for five to ten minutes. The formation of a white precipitate, changing to yellow, shows the presence of arsenic. (See Discussion 17. ) (43) Detection of Antimony. To the filtrate (40) add water just sufficient to make a total volume of 50 cc. ; transfer to a small flask and heat to about 90. Pass H 2 S into the hot solution for about five minutes, keeping the temperature at about 90 by placing the flask in a beaker containing boiling water. The formation of an orange-red precipitate shows the presence of antimony.
What to read after A Systematic Qualitative Chemical Analysis a Theoretical And Practical Study of?
You can find similar books in the "Read Also" column, or choose other free books by George Wallace Sears to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Of magnesia mixture (MgCl 2 -NH 4 Cl-NH 4 OH). Shake the contents vigor- ously and if no precipitate forms rub the walls of the tube with a glass rod and allow it to stand for some time. (See note, Preliminary Exp. I4a). The formation of a white crystalline precipitate indicates the presence of arsenic. Filter and confirm the arsenic by (42). (42) Confirmatory Test for Arsenic. Dissolve the precipitate of MgNH 4 AsO 4 (41) by pouring 5-10 cc. Of 6N. HC1 repeatedly through the filter. Heat the s...olu- tion to boiling and pass H 2 S into it for five to ten minutes. The formation of a white precipitate, changing to yellow, shows the presence of arsenic. (See Discussion 17. ) (43) Detection of Antimony. To the filtrate (40) add water just sufficient to make a total volume of 50 cc. ; transfer to a small flask and heat to about 90. Pass H 2 S into the hot solution for about five minutes, keeping the temperature at about 90 by placing the flask in a beaker containing boiling water. The formation of an orange-red precipitate shows the presence of antimony.
What to read after A Systematic Qualitative Chemical Analysis a Theoretical And Practical Study of?
You can find similar books in the "Read Also" column, or choose other free books by George Wallace Sears to read onlineMoreLess
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