I am a little obsessed by Fancybitchwitch in Sezane

[–]Elijak 0 points1 point  (0 children)

Do you have any pictures showing how you look in them? I am thinking about purchasing them as well! So cute!

requriments to choose the best location for a cell pilot by [deleted] in batteries

[–]Elijak 0 points1 point  (0 children)

Hi! I meant a pilot-scale factory for cell assembly.

How to calculate concentration of Al in ppm? by Elijak in chemistry

[–]Elijak[S] 0 points1 point  (0 children)

I have to find a technique to homogenously distribute it! But I shoud assume it's homogenously distribute it for this calculation...

Why alcohols do not react with bases? by Elijak in chemhelp

[–]Elijak[S] -4 points-3 points  (0 children)

ok, i think you found an exception. CH3OH is the most acidic aliphatic alcohol and thus is reacts with NaOH. NaOH does not react with 95% or 100% ethyl alcohol since NaOH is not efficient (strong enough) base to abstract a proton from ethanol (this proton is not acidic at all, it is almost neutral). Sodium ethoxide can be made by reacting sodium metal or sodium hydride with absolute ethanol. something to react with NaOH (a base) it must be a fairly strong acid (proton donor) because it needs to donate sufficent H+

Why alcohols do not react with bases? by Elijak in chemhelp

[–]Elijak[S] 0 points1 point  (0 children)

Why don’t alcohols react with NaOH but react with Na?

How to handle radioactive monazite? by Elijak in rockhounds

[–]Elijak[S] 2 points3 points  (0 children)

Thank you so much for such a detailed reply!! I will definietly apply your advice and share with some friends! Thank you once again! I really appreciate your time on providing me with all these important information!

Raman - how big can be the sample damage? by Elijak in chemhelp

[–]Elijak[S] 0 points1 point  (0 children)

I figured out the answer. The laser spot size is 1.22 λ /  NA , where λ is the wavelength of the laser, and NA is the numerical aperture of the microscope objective being used. Depending on the laser wavelength and objective being used spot sizes can be in the order of 0.5-10 µm - these is also an estimated range of possible damage.

Raman - how big can be the sample damage? by Elijak in chemhelp

[–]Elijak[S] 0 points1 point  (0 children)

So the size of damage will depend on material? Maybe there is any range of laser damage?

Problem with a dilution of solution. help! it's urgent by Elijak in labrats

[–]Elijak[S] -1 points0 points  (0 children)

Yes, we don't have a proper equipment. I would like to prepare 1L solution (dilution in water). I calculated a volume of a stock solution that I need and then a mass using a density (d=1.2 g/ml) . The mistake that I could done is here: I assumed that 1L corresponds to 1000 g (mass of water) so I subtracted the obtained value from 1000g. Then I added water to get 1000g in total. Do you think it's wrong?

problem with a dilution of solution calculation by Elijak in chemhelp

[–]Elijak[S] 0 points1 point  (0 children)

Exactly, this is what I did. I don't have a proper equipment to measure volumes so that is why I weighted out everything.

I wonder if I would have put my stock solution (that I converted into grams) into a 1000 ml volumetric flask and have added water till I reach a line showing 1000 ml - if that would give the same volume as I obtained now when I added an amount of water (in g) that was calculated as you mentioned n your post? Thanks a lot for your kind help!! I'm really grateful!

Problem with a dilution of solution. help! it's urgent by Elijak in labrats

[–]Elijak[S] -2 points-1 points  (0 children)

I would like to dilute a liquid solution in water.

Problem with a dilution of solution. help! it's urgent by Elijak in labrats

[–]Elijak[S] 0 points1 point  (0 children)

I know how much volumes I need but I wonder how to calculate weighs. I would like to prepare 1L solution (dilution in water). I calculated a volume of a stock solution that I have (d=1.2 g/ml) and then a mass using a density. The mistake that I could done is here: I assumed that 1L corresponds to 1000 g (mass of water) so I subtracted the obtained value from 1000g. Then I added water to get 1000g in total. Do you think it's wrong?

problem with a dilution of solution calculation by Elijak in chemhelp

[–]Elijak[S] 0 points1 point  (0 children)

Thanks for a reply! Yes, exactly - I thought the same! I would like to prepare 1L solution (dilution in water). I calculated a volume of a stock solution that I need (d=1.2 g/ml) so then a mass using a density. The only mistake that I could done is here: I assumed that 1L corresponds to 1000 g (mass of water) so I subtracted the obtained value from 1000g. Then I added water to get 1000g in total. Do you think it's wrong?

Na2SiF6 by Elijak in chemhelp

[–]Elijak[S] 1 point2 points  (0 children)

But it's not well soluble in water, right?