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Cheap hotplate stiring problems
From experience I can tell you that your Heidolph will serve you for years if you treat it well. It' ... |
21-1-2022 at 05:18
by: Antigua |
Edwards Speedivac pump
Thanks, I updated the inlet somewhat. The jubilee clip on the rubber is really tense and I don't thi ... |
29-12-2021 at 08:22
by: Antigua |
Edwards Speedivac pump
So I noticed another type of noise that could happen because the belt was too tense. I loosened it u ... |
28-12-2021 at 06:32
by: Antigua |
Edwards Speedivac pump
I took the entire gas ballast apart and put it back together, when turned out the pump didn't seem t ... |
27-12-2021 at 05:40
by: Antigua |
Edwards Speedivac pump
I feel pretty dumb now!
I was able to get the gas ballast assembly out, but I have no clue where th ... |
27-12-2021 at 04:32
by: Antigua |
Edwards Speedivac pump
Thanks for the suggestions!
I'm not sure if it could be related to the flapper valve, because IIRC ... |
27-12-2021 at 02:24
by: Antigua |
Edwards Speedivac pump
Do you mean the shaft seal? Like here: https://www.youtube.com/watch?v=jidG7yJDaVg?
I wasn't able t ... |
26-12-2021 at 03:05
by: Antigua |
Edwards Speedivac pump
Hi!
I have an Edwards ED75 double stage rotary vane pump that I've been using for vacuum distillati ... |
25-12-2021 at 09:31
by: Antigua |
Alibaba
Your thinking is very idealistic. Nothing changed, all the suppliers keep selling these barely legal ... |
11-10-2021 at 04:28
by: Antigua |
Sale of chemical reagents
Reminding that 2,4-dinitrophenol is deadly if used as what it's infamous for (J Med Toxicol. 7 (3): ... |
20-9-2021 at 04:26
by: Antigua |
Quantitative analysis of aldehydes
Tollens test and check the weight of silver precipitated. Or bisulfite adduct and calculate on it's ... |
6-8-2021 at 04:05
by: Antigua |
Why don't electrons lose energy when revolving?
Your presumption is wrong. Throw a ball into space and... it'll never stop going forward unless some ... |
5-7-2021 at 08:18
by: Antigua |
1,2-Methylenedioxybenzene from Sesamol(4-Hydroxy-1,2-Methylenedioxybenzene). Tosylation and reduction?
Why not just go for catechol methylenation...? Proven, good yields.
Catechol can be prepared from s ... |
30-6-2021 at 06:10
by: Antigua |
oil from unknown algae, arachidonic acid
[rquote=662228&tid=157632&author=Tsjerk]16S ribosomal DNA sequencing is the first thing that ... |
27-6-2021 at 03:49
by: Antigua |
Improved Purification Procedure Decarboxylation of L-tryptophan to Tryptamine with Benzoate salt
The same as with any other amine salt. Drip it into a stirring solution of somewhat dilute sodium hy ... |
16-6-2021 at 05:37
by: Antigua |
Nitric Acid
Yes - you can concentrate HNO3 up to 68%. At this concentration it's going to form what's called an ... |
15-6-2021 at 08:23
by: Antigua |
Preparation of 5-dimethoxy-phenylethylamine
You didn't really read the document, did you?
This is just a Wolff-Kischner reaction you showed us ... |
12-6-2021 at 08:00
by: Antigua |
Anhydrous Conditions
1. Oven dry and then flame dry the glassware. You'd be surprised how much water can cling to the gla ... |
17-5-2021 at 13:56
by: Antigua |
How to mix cocoa powder with sugar and milk?
Lol...I get what you mean. It's most convenient to first suspend the cocoa powder in milk and then s ... |
13-5-2021 at 09:42
by: Antigua |
RFNA and Vacuum Distillation of H2SO4
Yes, it's a good idea as long as your pump can resist sulfuric acid or you have a cold trap or other ... |
29-4-2021 at 01:17
by: Antigua |
Formaldehyde bisulfite adduct preparation
A nice addition to this topic:
75g of sodium sulfite (Na[sub]2[/sub]SO[sub]3[/sub]) was slushed up ... |
28-4-2021 at 13:37
by: Antigua |
A Note on the Synthesis of 3-Nitrophthalic Acid
I wish you posted this 2 years ago, haha! I used to have a lot of trouble with this reaction. But it ... |
24-4-2021 at 02:50
by: Antigua |
Methyl iodide (iodomethane) woes (Red P method)
I'd say - first evaporate as much of the MeOH as possible and then crash out with cold water. Will g ... |
24-4-2021 at 01:46
by: Antigua |
Methyl iodide (iodomethane) woes (Red P method)
And why did you expect 70ml? That's 0.88 moles and you used 0.3 mol iodine (in the end 0.6mol of met ... |
23-4-2021 at 12:05
by: Antigua |
Determining the Concentration of Dimethylamine in Anhydrous Ethanol
Yup, karlos is right, titration will suffice actually. If you do it carefully and with low concentra ... |
18-4-2021 at 14:15
by: Antigua |
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