Wash the beaker and crucible until the excess ammonium oxalate has been completely removed (this can be checked by the absence of chloride in the washing water).

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Was het bekerglas en de filterkroes totdat de overmaat ammoniumoxalaat volledig is verwijderd (dit kan worden aangetoond door de afwezigheid van chloride in het waswater).

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Bring to the boil, add eight to ten drops of indicator solution (4.8) and, slowly, 50 millilitres of a hot ammonium oxalate solution (4.4).

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Breng de oplossing aan de kook. Voeg 8 tot 10 druppels indicatoroplossing (4.8) toe en druppelsgewijs 50 ml van een warme ammoniumoxalaatoplossing (4.4).

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4.9. Ammonium salt, pure, such as ammonium oxalate (NH4)2C2O4, H2O or ammonium sulfate (NH4)2SO4.

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4.9. Ammoniumzout, zuiver, in de vorm van ammoniumoxalaat (NH4)2C2O4 7 H2O of ammoniumsulfaat (NH4)2SO4.

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6.7.1. Check that no loss of nitrogen occurs as a result of excessive heat or mechanical leaks during distillation, by using a test portion of 0,15 g of ammonium oxalate or sulphate (4.9.) weighed to the nearest 0,001 g together with 0,1 g of sucrose (4.8.).

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6.7.1. Controleer of er geen verlies optreedt ten gevolge van overmatige verhitting of mechanische lekken bij de distillatie door een hoeveelheid van 0,15 g ammoniumoxalaat of -sulfaat (4.9), tot op 0,001 g nauwkeurig afgewogen, en 0,1 g saccharose (4.8) te onderzoeken.

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Bring to the boil, add eight to ten drops of bromo-cresol green solution (3.8) and 30 ml of a warm solution of ammonium oxalate (3.5).

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Voeg toe 1 ml citroenzuuroplossing ( 3.6 ) en 5 ml ammoniumchloride-oplossing ( 3.7 ) en breng met water op een volume van ca .

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Date index: 2023-09-06