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UNBELIEVABLY CHEAP microscopes
I filed my complaint with ebay following their procedure, and was all prepared to have to wait a cou ...
28-7-2019 at 16:41
by: CharlieA
Useful reference books in the lab
RedDwarf's favorites are good choices. I like Lange's "Handbook of Chemistry." I have the 15th editi ...
23-7-2019 at 15:38
by: CharlieA
Can MgSO4 be used as a drying agent for MeI?
I don't understand what dimethyl sulfate has to do with it?
Yes, anhydrous MgSO4 or anhydrous Na2SO ...
21-7-2019 at 16:55
by: CharlieA
Which number you like more: 1.99 vs 2.01?
If you are doing scientific calculations, it does not matter which you would prefer to occur. It onl ...
21-7-2019 at 16:33
by: CharlieA
Tired of reporting spam
Really great. New spam is being posted faster than I can delete it. Is there a macro to make reporti ...
21-7-2019 at 16:24
by: CharlieA
Mass and Weight
Sulaiman: ambitious and very worthwhile project. I remember how pleased I was when I learned to use ...
18-7-2019 at 16:31
by: CharlieA
How accurate are solution density measurements?
I have used a 10 ml Class A volumetric flask and a balance reading to 1 mg, with decent (for me, any ...
18-7-2019 at 16:09
by: CharlieA
Is there a graph/formula of temperature increase vs amount of H2SO4 added to water?
@Ubya: Bravo! Thanks for the pdf. I found it a good refresher for long forgotten information!
Charl ...
7-7-2019 at 17:45
by: CharlieA
I found that elemental boron is inert to this aggressive chemical bulldozer
[rquote=615606&tid=151239&author=Tsjerk]You would think that someone with over 1400 posts wo ...
18-6-2019 at 17:09
by: CharlieA
Collecting aquatic critters
Microscopists use a drop or so of 1.5% methylcellusolve to slow them down. I might try a drop of (di ...
10-6-2019 at 16:31
by: CharlieA
Pottery grade materials purity (NiO and K2Cr2O7)
If you know the manufacturer(s) of these compounds, perhaps you can get the MSDS/SDS for them to get ...
3-6-2019 at 17:04
by: CharlieA
The antidote to modern chemistry textbooks
Contemporary textbooks in chemistry seem have adopted the notion that “more is better”; the book ...
3-6-2019 at 17:00
by: CharlieA
Why can't thionyl chloride be used to chlorinate oxalic acid to oxalyl chloride?
Test for phosgene from my prior laboratory experience: it smells like new-mown hay. THIS IS NOT A RE ...
17-5-2019 at 13:07
by: CharlieA
Sulfur experiment ideas
Why is it that a chemistry teacher can't figure out what to do (safely; not too exotically) with the ...
17-5-2019 at 13:03
by: CharlieA
Reaction Kinetics
@Metacelsus: "Great minds travel the same paths!" :D
16-5-2019 at 12:00
by: CharlieA
Reaction Kinetics
Are you "biting off more than you can chew"?
I can offer only a general method; the specific implem ...
16-5-2019 at 11:57
by: CharlieA
Organic Building Blocks
Alfa's definition of organic building blocks pretty much covers every organic compound known to man. ...
16-5-2019 at 11:51
by: CharlieA
Help wanted ... calibrating a 2kg F1 calibration weight.
How about calibrating all of your M-class weights to one of them designated as "MSM" (My standard ma ...
16-5-2019 at 11:40
by: CharlieA
Liner Alkanes to cycloalkanes
I assume "liner" means linear. You apologize for spelling but don't bother to correct it. I think an ...
16-5-2019 at 11:34
by: CharlieA
Do we need a separtate forum for lab safety and waste treatment?
ditto
15-5-2019 at 12:09
by: CharlieA
WHAT IF: (xkcd style question)
Bigger than 2 swimming pools? I can't believe that an estimate of the total amount of iron/iron ore ...
14-5-2019 at 12:59
by: CharlieA
Eye damage?
Have you consulted and had an examination by an ophthalmologist? I think that would be a prudent cou ...
14-5-2019 at 12:42
by: CharlieA
tannin source
Woodworkers "ebonize" (stain black) oak and other woods, by brushing on a solution of iron acetate m ...
11-5-2019 at 13:46
by: CharlieA
What happens to bonding during nuclear decay?
@opfromthestart: Interesting discussion. I have never considered the original question. I have learn ...
3-5-2019 at 16:42
by: CharlieA
Dehydratation of FeO(OH) and CaSO4
[rquote=611204&tid=149076&author=oberkarteufel]No, it's not a typo. This compound contains i ...
2-5-2019 at 17:18
by: CharlieA
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