Short Course in Inorganic Qualitative Chemistry for Engineering Students
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The formation of the precipitate is hastened by heating the solution gently, not above 70° C. Care must be taken in making this test always to have the ammonium molybdate present in considerable excess, otherwise the precipitate may not be thrown down. Arsenic and silicic 203 BORIC OE BOKACIC ACID.
acids, if present in the substance to be tested, must pt'eviously be removed, as they also are precipi- tated by ammonium molybdate, although not so readily as the phosphate. The solution best suited... for the reaction is one slightly acid with nitric acid.
The precipitate of phosphomolybdate after being washed with a solution of ammonium nitrate may be dissolved in ammonium hydrate and the phosphoric acid precipitated with " magne- sia mixture" (MgCl, , NH4CI + NH4OH).
3ORIC OR BORACIC ACID (H^BO^).
Boron is infusible and non-volatile, and when neated in the air burns to boric anhydride (B2O3). This is a colorless glass fusible at a red heat, and soluble in water and alcohol. On evap- orating these solutions boric acid volatilizes with the water or alcohol.
What to read after Short Course in Inorganic Qualitative Chemistry for Engineering Students?
You can find similar books in the "Read Also" column, or choose other free books by Wells, James Simpson Chester, 1851-1931 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The formation of the precipitate is hastened by heating the solution gently, not above 70° C. Care must be taken in making this test always to have the ammonium molybdate present in considerable excess, otherwise the precipitate may not be thrown down. Arsenic and silicic 203 BORIC OE BOKACIC ACID.
acids, if present in the substance to be tested, must pt'eviously be removed, as they also are precipi- tated by ammonium molybdate, although not so readily as the phosphate. The solution best suited... for the reaction is one slightly acid with nitric acid.
The precipitate of phosphomolybdate after being washed with a solution of ammonium nitrate may be dissolved in ammonium hydrate and the phosphoric acid precipitated with " magne- sia mixture" (MgCl, , NH4CI + NH4OH).
3ORIC OR BORACIC ACID (H^BO^).
Boron is infusible and non-volatile, and when neated in the air burns to boric anhydride (B2O3). This is a colorless glass fusible at a red heat, and soluble in water and alcohol. On evap- orating these solutions boric acid volatilizes with the water or alcohol.
What to read after Short Course in Inorganic Qualitative Chemistry for Engineering Students?
You can find similar books in the "Read Also" column, or choose other free books by Wells, James Simpson Chester, 1851-1931 to read onlineMoreLess
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