charles law using syringes

I would like to try this experiment using syringe stops/caps as I couldnt get a seal using a bung or blu tac.
Has anyone any advice on where to get the syringe caps from please?
 
For Charles law we use the capillary tube method.

We use silicon tube and Hoffman clips as in the aqa practical book to seal them for Boyle's law.

upload_2019-6-14_10-9-47.png

or use a 3 way valve as in the setup guide

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I think the only advantage to the Suph acid is that it absorbs any water vapor in the tube.
They are a PitA to get right though.
T
 
I think the only advantage to the Suph acid is that it absorbs any water vapor in the tube.
They are a PitA to get right though.
T
They are, we tried for many frustrating minutes - I'm sure there's a knack to it, but I can't remember what...
 

karen b

COMMITTEE
They are, we tried for many frustrating minutes - I'm sure there's a knack to it, but I can't remember what...

A very fine wire poked into the acid/mercury bead allows split threads to rejoin and you can usually adjust the position of the droplet as well.


We use the mercury bead method given in cleapss.

For the syringes I use thin walled rubber tubing folded over with a pinch clamp forming the seal. They are just standard plastic syringes and work tolerably well. Tying the string loop was the hardest bit
 
what size beakers do you use for the capilliaries, we have 2L ones, i'm looking to downsize as one broke.
 

karen b

COMMITTEE
what size beakers do you use for the capilliaries, we have 2L ones, i'm looking to downsize as one broke.
We have some tall 800ml weird shaped beakers (slightly conical) that we use. They are not really used for anything else
 
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