[scientizscht (OP)]

Hello!

I want to calculate how much the liquid level will rise in a capillary of 0.26mm diameter.

Any idea?

Thanks!

[Bored chemist]

Did you try this?
https://en.wikipedia.org/wiki/Capillary_action#Height_of_a_meniscus

[scientizscht (OP)]

Did you try this?
https://en.wikipedia.org/wiki/Capillary_action#Height_of_a_meniscus

Yes, I have a problem with the contact angle, how can I determine it?

[alancalverd]

That's a whole can of worms, because it is extremely sensitive to surface contamination, temperature, pressure, history, and just about every physical and chemical variable you can think of. It can even be negative (mercury in glass is a common example).

The general approach is to build your system and use the measured capillary rise to estimate contact angle!

[Bored chemist]

https://en.wikipedia.org/wiki/Contact_angle#Measuring_methods

Though I agree with Alan, the easiest thing to do is measure the capillary rise.

[scientizscht (OP)]

What is the real cause of capillary rise?

Is it the attractive forces between the liquid and the walls of the capillary?

Is it the attractive forces between the molecules of the liquid?

Is it the atmospheric pressure?

[Bored chemist]

What is the real cause of capillary rise?

Is it the attractive forces between the liquid and the walls of the capillary?

Is it the attractive forces between the molecules of the liquid?

Is it the atmospheric pressure?

Which factors appear in the equation for calculating it?

[scientizscht (OP)]

What is the real cause of capillary rise?

Is it the attractive forces between the liquid and the walls of the capillary?

Is it the attractive forces between the molecules of the liquid?

Is it the atmospheric pressure?

Which factors appear in the equation for calculating it?

Many that I don't know what they depend on, e.g. the contact angle or the surface tension.

Any specific answer?

[Bored chemist]

Of the precisely three things listed;
Is it the attractive forces between the liquid and the walls of the capillary?

Is it the attractive forces between the molecules of the liquid?

Is it the atmospheric pressure?
Which factors appear in the equation for calculating it?

[scientizscht (OP)]

Of the precisely three things listed;
Is it the attractive forces between the liquid and the walls of the capillary?

Is it the attractive forces between the molecules of the liquid?

Is it the atmospheric pressure?
Which factors appear in the equation for calculating it?

I don't like quizzes, if you know the answer feel free to say it.

[Bored chemist]

You already know the answer.
Since the atmospheric pressure does not appear in the equation for calculating capillary rise, it can't cause it.

Why didn't you realise that?

[scientizscht (OP)]

As I said before, in the equation there are contact angle and surface tension that I do not know their dependencies.

[Bored chemist]

As I said before, in the equation there are contact angle and surface tension that I do not know their dependencies.

And, as I said, the important thing is what is NOT in the equation.

[scientizscht (OP)]

As I said before, in the equation there are contact angle and surface tension that I do not know their dependencies.

And, as I said, the important thing is what is NOT in the equation.

What is that?

[Bored chemist]

As I said before, in the equation there are contact angle and surface tension that I do not know their dependencies.

And, as I said, the important thing is what is NOT in the equation.

What is that?

Since the atmospheric pressure does not appear in the equation...

[alancalverd]

The answer is "pretty well everything except atmospheric pressure, unless the atmosphere contains gases that dissolve in or react with the liquid or the solid, which most probably do."