[Messi]

Again, explained so nicely! Thank you!

[Messi]

ANOTHER Lab technique question!

How do I know how much solvent I should add to my reaction!?

My reaction includes 0.15g of sulfur, 1mL of an amine, 0.3mL of an alkyne and 0.2mL of an acid, 0.4mL of a strong base.

Thanks!

[fledarmus]

Hopefully, the procedure you got from a publication will give you some indication of a concentration. If not, you sort of have to pick a concentration and hope for the best. After a while you get good at figuring out which reactions are going to go very fast and may need to be run more dilute, and which ones will be slow and will need to be concentrated. And of course, the solubility of your starting materials or products may determine how much solvent you need.

Usually I would start with ~0.1 to ~1 M of my limiting reagent in the solvent. Smaller reactions I tended to run a little more dilute, just because it is hard to measure and manipulate very small quantities of solvent.

[Messi]

After a while you get good at figuring out which reactions are going to go very fast and may need to be run more dilute, and which ones will be slow and will need to be concentrated.

Why do fast reactions need to be run more dilute?

[Borek]

When you dilute you slow down the reaction, that makes it easier to control.

[Messi]

Thanks Borek

[Messi]

ANOTHER technique question

Is it ok to run two SIMULTANEOUS reactions in the same fumehood!?

Two for the price of one. Save some time

[fledarmus]

Run as many reactions as you want!

https://www.google.com/search?q=reaction+block&hl=en&safe=off&tbo=u&rls=com.microsoft:en-us:IE-Address&rlz=1I7ADRA_en&tbm=isch&source=univ&sa=X&ei=3FekUNvfI8Ts0QGyzYF4&ved=0CEoQsAQ&biw=1680&bih=819

[Messi]

Run as many reactions as you want!

Now that's what I call epic!

Too bad my school is old and everything is done with my two hands

Maybe Santa will find me this year though?

[discodermolide]

You mean you want hands for Xmas? You'd better write to Santa now then he must have a forum somewhere on the net.

[curiouscat]

You mean you want hands for Xmas? You'd better write to Santa now then he must have a forum somewhere on the net.

You can actually post a card marked "Santa, North Pole" and it gets delivered to him!

[discodermolide]

I do that every year but it obviously never gets there as I never get what I put on the card

[curiouscat]

I do that every year but it obviously never gets there as I never get what I put on the card

Maybe you just weren't good enough in the years past?

[discodermolide]

That could be

[Borek]

You can actually post a card marked "Santa, North Pole" and it gets delivered to him!

These cards are actually delivered to Rovaniemi on arctic circle. Been there two years ago.