Potenital Differnce between Salt Bridge and rxn

[ktmtalker]

Homework Statement

A 0.100 M solution of sodium palmitate (C15H31COONa) is separated from a 0.200
M NaCl solution by a membrane barrier that is permeable to Na+ and Cl-, but not to palmitate
ions.

I need to calculate the concentrations of the ions on both sides of the barrier once equilibrium is established. Along with the potential difference across the membrane due to the equilibrium established above.
b.

Homework Equations

The Attempt at a Solution

To find the concentration on each side, a comparison of Na, and Cl was made, and the each side was made equal to each other. This resulted in .15 Na, and .1 Cl for each side.
To find the potential difference, equations from our data section were used, however these numbers did not seem right.
Looking for any direction on how to get through the problem. Thanks!

 

[Borek]

What equations will describe equilbrium?

 

[Blueshift5]

it is important to understand the concept of potential difference and its role in chemical reactions. In this scenario, we have a membrane barrier separating a 0.100 M solution of sodium palmitate from a 0.200 M NaCl solution. The membrane is permeable to Na+ and Cl- ions, but not to palmitate ions. This means that the Na+ and Cl- ions can freely pass through the membrane, while the palmitate ions cannot.

To calculate the concentrations of the ions on both sides of the membrane once equilibrium is established, we need to consider the principles of equilibrium and the concept of electrochemical potential. At equilibrium, the concentrations of ions on both sides of the membrane will be equal, as stated in the problem. This means that the concentration of Na+ on both sides will be 0.15 M, and the concentration of Cl- on both sides will be 0.1 M.

To calculate the potential difference across the membrane, we need to consider the electrochemical potential of each ion. The electrochemical potential is a measure of the energy required to move an ion from one side of the membrane to the other. In this case, the electrochemical potential of Na+ and Cl- will be the same on both sides of the membrane, as they are in equal concentrations.

Therefore, the potential difference across the membrane will depend on the difference in the electrochemical potential of the palmitate ion on the two sides of the membrane. Since the membrane is impermeable to palmitate ions, the electrochemical potential of palmitate will be different on each side. This will result in a potential difference across the membrane.

To accurately calculate this potential difference, we would need more information about the properties of the membrane and the electrochemical potential of palmitate. Without this information, it is difficult to provide a specific solution to the problem. However, understanding the principles of equilibrium and electrochemical potential can help guide us in finding a solution.

In conclusion, the potential difference across the membrane will be dependent on the differences in the electrochemical potential of the palmitate ion on each side of the membrane. Further information is needed to accurately calculate this potential difference.