Questions tagged [equipment]
Questions regarding the equipment used in labs (such as flasks, tubes etc.), their operation and maintenance.
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Safest way to conduct a reaction with bromine under reflux conditions
I am conducting an electrophilic aromatic bromination reaction according to literature. The substrate and intended substitution pattern do not matter, but the reported procedure requires the dropwise ...
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Reduction by Activated Carbon
Does reduction by carbon itself occur when filtration is performed using activated carbon? Is it part of the central mechanisms involved in activated carbon filtration?
One of the specificities of all ...
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Experience with PTFE tubing & glass connectors?
I'm wondering which PTFE tubing size to get to connect to normal 10mm OD glass connectors. For a silicon hose I would take an ID of 8-9mm as it is flexible but I think PTFE is quite rigid.
Anyone has ...
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What has happened with the pH-meter?
The glass sensor has became red inside like something melted. I stored it in a liquid with pH that mentioned in the manual. What is that and why could that happen, how often that happens with pH-...
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Sintered vs perforated plate Büchner funnels
I just bought a sintered-glass style Büchner funnel for some vacuum filtration tasks. There's two issues I'm having with it:
Filter material, especially activated charcoal, ends up stuck in the glass ...
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when using glass to glass stoppers, is it best to have them dry or use lubricant?
I have some glass flasks that have glass stoppers. It’s basically the typical glass stopper with the frosted tip which fits into a glass opening. Basically think of a typical glass volumetric flask. i ...
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Affordable, non-contaminating flexible tubing for common acids
Which tubing material is affordable, flexible, widely available, and suited for transporting very pure acids ("puriss." products) in their most concentrated form without contaminating them?
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What kind of filter can remove zeolite dust from ethanol?
I only really have high school level knowledge of chemistry, and also I don't really own any lab equipment.
I'm using 3A zeolite molecular sieves to dry ethanol (and sometimes isopropanol) and they ...
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Is the width of a Soxhlet Condenser Inherent to its Function?
Soxhlet extractors are often coupled to a specifically designed condenser with a very large lower joint.
Is this inherent to it's function as a condenser in the apparatus or only because the Soxhlet ...
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Confused Reading of Pressure on Vacuum Gauge [closed]
I have a gauge used to measure vacuum but I'm a bit confused as the measurements state "Hg" (I would have supposed inches of mercury except it goes to -30) and "Bar" going to minus ...
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What the difference in data if calibrate pH-meter with 2 and 3 solutions? [closed]
pH-meter (12 bucks one) can be calibrated with 2 different solutions (let's say 4.0 and 6.86), but as an option 3 can be used (4.0, 6.86 and 9.18). If I use 2 instead of 3, what error I'm going to get....
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Which Additives May be Present in Cellulose Filter Paper? [closed]
I'm wondering what, other than cellulose, might be contained in filter paper (the kind routinely used in Buchner filters / normal funnels).
A search here on Chemistry Stackexchange shows that at least ...
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Compact way to regulate 3000psi (200bar) down to 30psi (2bar)?
This was originally posted on the Lego page, and closed because it's not actually about Lego itself. I thought I'd give them a chance first, in case someone had done this already and had some ...
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Looking for advice regarding a larger scale soxhlet extraction
I have successfully completed a few soxhlet extractions at a much smaller scale using a soxhlet extractor with ~200ml capacity. With that, I was able to extract from ~100g of pre-powdered, sonicated ...
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can i use an isobutane stove (like jetboil) or butane blowtorch with borosilicate glass?
I don't have a bunsen burner, but have a camping stove (similar to https://www.amazon.com/Stansport-183-B-Isobutane-Backpack-Stove/dp/B004EPWM5S) and a blow torch. I'd like to do some distillation ...
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