Login

Join for Free!
117047 members


speed of osmosis?

Debate and discussion of any biological questions not pertaining to a particular topic.

Moderator: BioTeam

speed of osmosis?

Postby newbie46 » Tue Jan 31, 2012 1:57 am

hello, i was learning about osmosis in school and i have a question about it. does the size of the solutes dissolved in water affect the rate of osmosis? kind of a funky question but i just wanna know :) thanks!
newbie46
Garter
Garter
 
Posts: 4
Joined: Tue Jan 31, 2012 1:55 am

Postby JackBean » Tue Jan 31, 2012 8:36 am

you mean if you compare e.g. Na+ and say heme? Yes.
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5667
Joined: Mon Sep 14, 2009 7:12 pm

Re: speed of osmosis?

Postby newbie46 » Wed Feb 01, 2012 10:03 pm

thanks for your quick response. but would larger solutes cause osmosis to happen more quickly or slowly than smaller solutes? also, if you could please elaborate on why ? thank you!
newbie46
Garter
Garter
 
Posts: 4
Joined: Tue Jan 31, 2012 1:55 am


Postby JackBean » Thu Feb 02, 2012 8:32 am

what do you think?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5667
Joined: Mon Sep 14, 2009 7:12 pm

Re: speed of osmosis?

Postby newbie46 » Fri Feb 03, 2012 9:41 pm

well, if i were to guess, i would have to say that a larger solute would take less energy since it would be less liable to slip through the membrane. in class we barely went over the topic of osmosis so i'm not exactly sure of what a large solute like sugar would do vs a small solute like sodium.
newbie46
Garter
Garter
 
Posts: 4
Joined: Tue Jan 31, 2012 1:55 am

Postby JackBean » Mon Feb 06, 2012 9:45 am

less energy? What do you mean by that?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5667
Joined: Mon Sep 14, 2009 7:12 pm

Re: speed of osmosis?

Postby newbie46 » Tue Feb 07, 2012 12:28 am

well, i guess i was thinking of reverse osmosis when i said energy :mrgreen:

im still not exactly sure of how or why the size of the solute would or wouldnt affect the rate. is there something i failed to research correctly, since none of my research has given me any results :(
newbie46
Garter
Garter
 
Posts: 4
Joined: Tue Jan 31, 2012 1:55 am

Postby JackBean » Thu Feb 09, 2012 2:17 pm

Just imagine some large net with relatively large holes in it. Cat will go through it easily, right? You will have probably some problems, but may be able to pass. Elephant would have no chance to get through, unless it breaks it :lol:
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5667
Joined: Mon Sep 14, 2009 7:12 pm

Re: speed of osmosis?

Postby jonmoulton » Thu Feb 09, 2012 4:07 pm

This might help -- smaller molecules diffuse faster than larger molecules. Think about the relationship of diffusion and osmosis. In addition to diffusion, membrane permeability is a factor -- that's Jack's cats and elephants metaphor. The combination of diffusion rate and membrane permeability determines the rate of osmosis. Other factors, such as temperature and viscosity, will also affect the rate. What others did I miss?
User avatar
jonmoulton
Viper
Viper
 
Posts: 429
Joined: Fri Feb 15, 2008 5:38 pm
Location: Philomath, Oregon, USA


Return to General Discussion

Who is online

Users browsing this forum: No registered users and 7 guests

cron