Hmwk 14.101


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kshalbi
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Joined: Fri Sep 25, 2015 3:00 am

Hmwk 14.101

Postby kshalbi » Thu Feb 04, 2016 5:04 pm

The question says that in a neuron the [K+] of ions in the cell is 20-30 times as great as that outside. The solutions manual, when using the nernst equation, writes the ln part as ln (1/30). How would I know to write it that way as opposed to ln (30/1) ?

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Re: Hmwk 14.101

Postby Chem_Mod » Thu Feb 04, 2016 7:23 pm

Q = [p]/[r]. Since the concentration is greater inside the neuron, we expect that K+ ions will flow from inside to outside. That makes the inside the reactant and outside the product. Therefore you have Q=1/30.

kshalbi
Posts: 68
Joined: Fri Sep 25, 2015 3:00 am

Re: Hmwk 14.101

Postby kshalbi » Thu Feb 04, 2016 8:24 pm

Ohhhhhhhhhh. I see. Thank you!


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