Okay- Let me tell you the truth- I work at a store that sells supplies that make beer. It's fun- they have a whole bunch of conical flasks and chems
for sale and everything. I am joining the affiliate program, so pretty soon I can give you a link to buy stuff and I can get a raise... but anyways...
One of my coworkers (who is a lot older than me) told me he has a round bottom flask with a long neck, and he wants to give it to me, because he is
afraid he will knock it over. I tell him thanks and I would enjo that, he gives it to me the next day, and it is a pyrex class A volumetric flask with
a 19 glass stopper. WOW!!! Anyways, the flask has a large red transparent
square on the neck. I thought this might be used to see the meniscus, but I can't find it's purpose. What is it for?GreenD - 10-7-2011 at 17:07
probably if you do knock it over, the impact will hit the plastic thing.
common fallacy is that those plastic things on graduated cylinders are used to find the meniscus - they aren't. They are just if you tip it over it is
less likely to break.Mailinmypocket - 10-7-2011 at 17:25
I think he may mean that the red square is printed/etched into the glass... I may be wrong but either way, I have no idea what purpose that would
serve!ScienceHideout - 11-7-2011 at 07:14
I think he may mean that the red square is printed/etched into the glass... I may be wrong but either way, I have no idea what purpose that would
serve!
Did a whole lot of research, it is called a pyrex lifetime red flask. It says the square "eliminated the use of a filler". Is there such thing as a
volumetric flask filler? What filler are they talking about?gutter_ca - 11-7-2011 at 08:23
It's just a permanent way tosee the volume mark, the red will never etch away, you'll always be able to see the mark.
WOW!!! Anyways, the flask has a large red transparent
square on the neck. I thought this might be used to see the meniscus, but I can't find it's purpose. What is it for?