# Help with Biology Question

1. Feb 1, 2014

### student93

1. The problem statement, all variables and given/known data

I've attached both parts of the problem in this post.

2. Relevant equations

For Part 1: X=√2DT

3. The attempt at a solution

Part 1:

X=√2(1x10^-5cm/s)(32s)=0.025cm=Radius
Diameter= 0.025cmx2=0.05cm

(I assumed x is a value that is always equal to the radius, though that could be an incorrect assumption.)

Part 2:

A. In case A the net flux will flow from Compartment 2 to Compartment 1 (From Higher to Lower concentration in order to reach equilibrium). In Case B the net flux will be from compartment 1 to Compartment 2. (From Higher to lower concentration in order to reach equilibrium).

(Is this correct? Also does osmotic pressure have any relevancy in regards to this question, and if it does could someone please clarify what osmotic pressure actually does?)

B. In Case A: 9+11=20 -> 20/2 = 10
In Case B: 22+20= 42 -> 42/2 = 21
(I couldn't find any relevant equations and basically assumed this was the only method in regards to calculating the equilibrium concentration).

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