All Questions
Tagged with experimental-chemistry safety
45
questions
-1
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0
answers
62
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Cooling a 100°C beaker in cold water
In my nanoparticle synthesis, I need to cool a beaker with boiling solution (50mL beaker) rapidly to arrest a reaction at a specific size of nanoparticle. Letting the hot beaker cool passively is too ...
- 154
4
votes
0
answers
50
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Why cool a reaction down when adding reagents if you're only going to reflux subsequently?
I've seen several procedures using thionyl chloride (SOCl2) to make an ester, where the first step is to add the thionyl chloride to the reagent/solvent on ice or subzero temperature, followed ...
- 161
-4
votes
4
answers
192
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Drying salts with HCl solution
I'm following a protocol from some old literature (1962), and I want to make sure I'm being safe. It asks you to dissolve some salts in 150 mL water + 25 mL concentrated HCl, then evaporate to dryness ...
- 19
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votes
1
answer
531
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How is Magnesium Ethoxide appropriately prepared, stored and used to dry ethanol?
I found many procedures vaguely describing the preparation of magnesium ethoxide from elemental magnesium in excess dry ethanol in the presence of I2 as activator (in absence of air), I also know that ...
- 1,097
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votes
1
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68
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Can Bromophenol Blue Sodium Salt, and Pentane be safely mixed/in contact with each other?
I'm trying to determine if powdered Bromophenol blue is safe to mix with Pentane. I would only need a tiny amount of dye, just enough to tint the pentane.
I need to use pentane for it's specific ...
- 3
-4
votes
1
answer
548
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Practices while using a boiling tube
When using a boiling tube to boil a liquid, I am frequently advised to move the boiling tube in and out of the Bunsen flame and when the liquid starts to boil, remove the tube from the flame for a few ...
- 193
3
votes
0
answers
92
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Safety concerns (Cyanide): Dicyandiamide + Polyamine condensation reaction
I am attempting to synthesize a poly-amine polymer by condensation between dicyandiamide (also known as cyanoguanidine and dicyandiamine) and diethyltriamine. The polymer is a kind of dye fixative ...
- 604
1
vote
0
answers
42
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Standard practice for keeping salts dry
I should point out first that I'm not a chemist, but I'm currently doing a little bit of chemistry; this should clarify that I don't have formal training in a chemistry lab (other than some basic chem ...
- 89
2
votes
2
answers
92
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Lab goggle recommendations?
I'm taking my first chemistry class with a laboratory component this quarter. My first laboratory session was earlier this evening (observing simple metathesis reactions). While I found the lab work ...
- 37
17
votes
1
answer
10k
views
Neutralizing a sulfuric acid spill
From my AP Chem Prep Book:
What should you do if you spill sulfuric acid on the countertop?
A) Neutralize the acid with vinegar.
B) Sprinkle solid NaOH on the spill.
C) Neutralize the acid with ...
- 388
0
votes
1
answer
1k
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How can I neutralise H2 gas without burning it? [closed]
I was thinking of maybe making it bubble into a solution containing something that would react with H2 yielding either a dissolved substance or a precipitate from the reaction.
Maybe a solution with ...
- 451
2
votes
1
answer
2k
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Is it considered safe to sonicate with flammable solvents?
I use a sonicator at work in a cleaning process. It involves sonicating acetone, NMP, and IPA. We would like to move forward with other flammables as well. We currently do the work in a hood, but no ...
- 21
-1
votes
1
answer
58
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Why is aluminium used to treat waste after a lab experiment? [closed]
How does adding aluminum metal pieces into a waste beaker help treat solids and liquids in the beaker so you can safely send the solids to a landfill and dispose of the liquids in the sink drain ...
- 1
4
votes
1
answer
621
views
What type of gloves should be used while diluting sulfuric and hydrochloric acids?
What type of gloves should we use on hands while diluting sulfuric and hydrochloric acid?
Can we use these gloves in chemistry lab to handle other acids?
1
vote
0
answers
43
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How to safely change the color of a fire tornado?
So I've been watching a lot of fire tornado videos and I came across one that had a reasonable and safe setup (around the 3:23 mark):
Fire Tornado DIY
Is there a way to change the color of the fire ...
