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| chemical:hno3:distillation [2013/10/20 14:59] – external edit 127.0.0.1 | chemical:hno3:distillation [2018/09/05 17:00] (current) – [References] mcmaster |
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| Don't try to pour old the hot H2SO4 / KNO3 biproduct (KHSO4). It will likely solidify on the cooler upper half of the flask and close it off. This can cause pressure to build from the still hot bottom cooking off. Instead, wait until its cool and then add water. It will likely take a number of washings to get it all out. Warm water and sloshing it around so that it breaks up and not just dissolves helps. I blow the flask with a fan to help it cool down faster. The more acid you use the more acid that will be leftover and keeping the mixture liquid. Above: KHSO4 waste product. | Don't try to pour old the hot H2SO4 / KNO3 biproduct (KHSO4). It will likely solidify on the cooler upper half of the flask and close it off. This can cause pressure to build from the still hot bottom cooking off. Instead, wait until its cool and then add water. It will likely take a number of washings to get it all out. Warm water and sloshing it around so that it breaks up and not just dissolves helps. I blow the flask with a fan to help it cool down faster. The more acid you use the more acid that will be leftover and keeping the mixture liquid. Above: KHSO4 waste product. |
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| | ====== References ====== |
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| | http://www.sciencemadness.org/talk/viewthread.php?tid=13090&page=2 |
| | * Persulfate to reduce NO2 |
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